PSAT Math Multiple-Choice Question 818: Answer and Explanation
Question: 818
Solve for x in the equation below:
7 + 2(x - 3) = -3(x + 1) - 4
- A.
- B. -1
- C.
- D. 3
Correct Answer: A
Explanation:
(A) Start by distributing the 2 through the parentheses on the left and the 3 through the parentheses on the right:
7 + 2(x - 3) = -3(x + 1) - 4
7 + 2x - 6 = -3x - 3 - 4
Simplify and solve for x:
1 + 2x = -3x - 7 →
5x = -8 →
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