BackChapter 2 Review – Beginning Algebra Guidance
Study Guide - Smart Notes
Tailored notes based on your materials, expanded with key definitions, examples, and context.
Q1. Solve for :
Background
Topic: Solving Linear Equations
This question tests your ability to solve a simple linear equation for the variable .
Key Terms and Formulas
Linear equation: An equation involving only the first power of the variable.
Isolate the variable: Move all terms involving to one side and constants to the other.
Step-by-Step Guidance
Identify the equation:
Subtract $11x$:
Simplify both sides:
(expression to be calculated)
Try solving on your own before revealing the answer!
Final Answer:
Subtracting $11x = -17$.
Q2. Solve for :
Background
Topic: Solving Linear Equations with Fractions
This question tests your ability to solve a linear equation where the variable is multiplied by a fraction.
Key Terms and Formulas
Fractional coefficient: The variable is multiplied by .
To isolate , multiply both sides by the reciprocal of , which is $7$.
Step-by-Step Guidance
Identify the equation:
Multiply both sides by $7x$:
Simplify both sides:
(expression to be calculated)
Try solving on your own before revealing the answer!
Final Answer:
Multiplying both sides by $7x = -56$.
Q3. Solve for :
Background
Topic: Solving Linear Equations
This question tests your ability to solve a linear equation where the variable is multiplied by a constant.
Key Terms and Formulas
To isolate , divide both sides by $5$.
Step-by-Step Guidance
Identify the equation:
Divide both sides by $5x$:
Simplify both sides:
(expression to be calculated)
Try solving on your own before revealing the answer!
Final Answer:
Dividing both sides by $5x = -5$.
Q4. Solve for :
Background
Topic: Solving Linear Equations
This question tests your ability to solve a linear equation with both variable and constant terms.
Key Terms and Formulas
To isolate , first add $7.
Step-by-Step Guidance
Identify the equation:
Add $7$ to both sides:
Simplify:
(expression to be calculated)
Divide both sides by $4x$:
(expression to be calculated)
Try solving on your own before revealing the answer!
Final Answer:
Adding $7 gives .
Q5. Solve for :
Background
Topic: Solving Linear Equations with Variables on Both Sides
This question tests your ability to solve a linear equation where appears on both sides.
Key Terms and Formulas
Move all terms to one side and constants to the other.
Step-by-Step Guidance
Identify the equation:
Subtract from both sides to get all terms on one side:
Simplify:
Add $8$ to both sides:
Simplify:
(expression to be calculated)
Divide both sides by $3x$:
(expression to be calculated)
Try solving on your own before revealing the answer!
Final Answer:
After simplifying and dividing, .
Q6. Solve for :
Background
Topic: Solving Linear Equations with Multiple Terms
This question tests your ability to combine like terms and solve for .
Key Terms and Formulas
Combine like terms: Add or subtract terms with the same variable or constant.
Step-by-Step Guidance
Identify the equation:
Combine like terms on each side:
Left: ,
Right:
So,
Subtract from both sides:
Simplify:
Add $3$ to both sides:
Simplify:
Try solving on your own before revealing the answer!
Final Answer:
After simplifying, .
Q7. Solve for :
Background
Topic: Solving Linear Equations with Parentheses
This question tests your ability to use the distributive property and solve for .
Key Terms and Formulas
Distributive property:
Combine like terms after distributing.
Step-by-Step Guidance
Identify the equation:
Apply the distributive property:
Left: ,
So,
Right: ,
So,
Combine like terms:
Left: , so
Right: , so
Set the simplified equation:
Add to both sides:
Simplify:
Try solving on your own before revealing the answer!
Final Answer:
After isolating , .
Q9. Solve for :
Background
Topic: Solving Linear Equations with Fractions
This question tests your ability to solve equations with fractional coefficients and variables on both sides.
Key Terms and Formulas
Clear fractions by multiplying both sides by the least common denominator (LCD).
Combine like terms and solve for .
Step-by-Step Guidance
Identify the equation:
Find the LCD of $5, which is $20$.
Multiply both sides by $20$ to clear fractions:
Simplify each term:
Expand and combine like terms:
Subtract from both sides:
Simplify:
Try solving on your own before revealing the answer!
Final Answer:
After isolating , .
Q10. Write an expression for: Five less than four times a number.
Background
Topic: Translating Words to Algebraic Expressions
This question tests your ability to convert a verbal phrase into an algebraic expression.
Key Terms and Formulas
"Four times a number" means .
"Five less than" means subtract $5$ from the previous quantity.
Step-by-Step Guidance
Identify the number as .
Write "four times a number":
Subtract $5 to represent "five less than four times a number":
Try writing the expression on your own before revealing the answer!
Final Answer:
The expression is .
Q11. The sum of half a number and nine is 15. Find the number.
Background
Topic: Translating Words to Equations and Solving
This question tests your ability to write and solve an equation based on a word problem.
Key Terms and Formulas
"Half a number" means .
"Sum" means addition.
Step-by-Step Guidance
Let the number be .
Write the equation:
Subtract $9$ from both sides:
Simplify:
Multiply both sides by $2x$:
Try solving on your own before revealing the answer!
Final Answer:
Multiplying both sides by $2x = 12$.
Q12. Fill in the blank: $0-1$
Background
Topic: Comparing Numbers
This question tests your understanding of inequalities and the order of numbers.
Key Terms and Formulas
Inequality symbols: (less than), (greater than), (equal to)
Step-by-Step Guidance
Compare $0-1$ on the number line.
Recall that $0-1$.
Choose the correct inequality symbol to fill the blank.
Try filling in the blank on your own before revealing the answer!
Final Answer:
$0-1$.
Q13. Fill in the blank: ______ $44$
Background
Topic: Comparing Numbers
This question tests your understanding of inequalities and the order of numbers.
Key Terms and Formulas
Inequality symbols: (less than), (greater than), (equal to)
Step-by-Step Guidance
Compare and $44$ on the number line.
Recall that is less than $44$.
Choose the correct inequality symbol to fill the blank.
Try filling in the blank on your own before revealing the answer!
Final Answer:
is less than $44$.