IM Grade 8 Unit 4: Check Your Readiness

Which of these expressions is equivalent to 3(x - 2)?

• 3x - 6

• 3x - 2

• 3x + 2

• 3x + 6

Which of these expressions is equivalent to -2(x - 5)?

• -2x - 5

• -2x + 5

• -2x + 10

• -2x - 10

Combine like terms, and write an equivalent expression with fewer terms.

4x + 3x

Combine like terms, and write an equivalent expression with fewer terms.

3𝑥 + 5𝑥 − 1 

Combine like terms, and write an equivalent expression with fewer terms.  

5 + 2𝑥 + 7 + 4𝑥

Combine like terms, and write an equivalent expression with fewer terms.   

4 − 2𝑥 + 5𝑥 

Combine like terms, and write an equivalent expression with fewer terms.   

10𝑥 − 5 + 3𝑥 − 2 

Find a value for x that makes the equation true.

2x + 3 = 20.

• x = 8.5

• x = 8

• x = 9

• x = 10

For the equation -2(x - 4) = 4, determine if x = 2 is a solution.

• Yes, x = 2 is a solution.

• No, x = 2 is not a solution.

Determine if x = 2 is a solution of the equation 26/x = 13.

• x = 2 is a solution since 26/2 equals 13.

• x = 2 is not a solution because 26/2 does not equal 13.

• x = 2 is not a valid substitution for this equation.

• None of the above.