Which of the following equations has a solution of −7

?(1 point)
Responses

4x−23=5
4 x minus 23 equals 5

−x+3=−4
negative x plus 3 equals negative 4

5x+11=−24
5 x plus 11 equals negative 24

−3x−8=−29

1 answer

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

  1. For \( 4x - 23 = 5 \): \[ 4(-7) - 23 = -28 - 23 = -51 \quad (\text{not } 5) \]

  2. For \( -x + 3 = -4 \): \[ -(-7) + 3 = 7 + 3 = 10 \quad (\text{not } -4) \]

  3. For \( 5x + 11 = -24 \): \[ 5(-7) + 11 = -35 + 11 = -24 \quad (\text{true}) \]

  4. For \( -3x - 8 = -29 \): \[ -3(-7) - 8 = 21 - 8 = 13 \quad (\text{not } -29) \]

The equation that has a solution of \( x = -7 \) is: \( 5x + 11 = -24 \).