Which of the following equations has a solution of −7?. (1 point)

A. −3x − 8 = −29

B. 4x −23 = 5

C. -x + 3 = −4

D. 5x + 11 = −24

1 answer

To determine which equation has a solution of \(x = -7\), we can substitute \(-7\) into each equation and see if the equation holds true.

Option A: \(-3x - 8 = -29\)
Substituting \(x = -7\): \[ -3(-7) - 8 = -29 \ 21 - 8 = -29 \ 13 \neq -29 \quad \text{(not true)} \]

Option B: \(4x - 23 = 5\)
Substituting \(x = -7\): \[ 4(-7) - 23 = 5 \ -28 - 23 = 5 \ -51 \neq 5 \quad \text{(not true)} \]

Option C: \(-x + 3 = -4\)
Substituting \(x = -7\): \[ -(-7) + 3 = -4 \ 7 + 3 = -4 \ 10 \neq -4 \quad \text{(not true)} \]

Option D: \(5x + 11 = -24\)
Substituting \(x = -7\): \[ 5(-7) + 11 = -24 \ -35 + 11 = -24 \ -24 = -24 \quad \text{(true)} \]

The correct answer is D. \(5x + 11 = -24\).