Linear Equations Unit Test (8th CCSS)

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1. Simplify an expression for the perimeter of the equilateral triangle shown below.

2. Which of the following expressions has a simplified value of 3a – 2?

• A. -6a + 9a + 4 – 2
• B. -a + 4 + 5a – a – 6
• C. -8 + 3a + 10 – a
• D. -10 – 5a + 12 + 8a

3. Which is the correct simplified version of the expression shown after distributing and combining like terms?

• A. 5x + 6
• B. 11x + 6
• C. 5x - 6
• D. 11x - 6

4. Simplify the expression by distributing and combining like terms.

5. Which is the correct first step to solve the linear equation shown?

• A. Add 2.5 to both sides
• B. Divide -2.5 from both sides
• C. Add 15 to both sides
• D. Subtract 15 from both sides

6. Solve the equation below.

7. Austin solved the equation as shown below. Which correctly describes the error that Austin made in his work?

• A. Austin did not combine 7x and 8x correctly.
• B. Austin did not combine -3 and -9 correctly.
• C. Austin did not divide correctly.
• D. Austin did not make an error in his work.

8. Solve the equation below.