Question

which equation has the solution $x = 3$? answer $5x + 8 = 23$ $5x - 1 = 26$ $8x - 4 = -20$ $2x + 2 = 24$

Explanation:

Step1: Substitute x = 3 into 5x + 8 = 23

$5\times3+8=15 + 8=23$, the left - hand side equals the right - hand side.

Step2: Substitute x = 3 into 5x - 1 = 26

$5\times3-1=15 - 1 = 14
eq26$.

Step3: Substitute x = 3 into 8x - 4 = - 20

$8\times3-4=24 - 4=20
eq - 20$.

Step4: Substitute x = 3 into 2x + 2 = 24

$2\times3+2=6 + 2 = 8
eq24$.

Answer:

$5x + 8 = 23$