Bluebook SAT Test Linear Equations in One Variable 15

Question 1

If 3(x + 4) = 5x − 2, what is x?

Accepted Answer

7

Answer

3x + 12 = 5x − 2 → 14 = 2x → x = 7.

Question 2

A savings account earns $15 per month in interest. After 8 months the account has $320. What was the initial balance?

Accepted Answer

$200

Answer

P + 15(8) = 320 → P + 120 = 320 → P = 200.

Question 3

Solve for x: 5x − (x + 2) = 2(x + 5)

Accepted Answer

6

Answer

4x − 2 = 2x + 10 → 2x = 12 → x = 6.

Question 4

For what value of c does the equation 2x + c = 5x − 9 have the solution x = 5?

Accepted Answer

6

Answer

2(5) + c = 5(5) − 9 → 10 + c = 16 → c = 6.

Question 5

Kai has $150 in a bank and withdraws $12 each week. After w weeks he has $54. What is w?

Accepted Answer

8

Answer

150 − 12w = 54 → 12w = 96 → w = 8.

Bluebook SAT Practice Test