Question

Becky and Tommy are asked to solve -4x - 25 = 8x + 15. Identify where one of them made an error. (1 point)
Becky
Tommy
-4x - 25 = 8x + 15
-4x - 25 - 8x = 8x + 15 - 8x
-12x - 25 = 15
-12x - 25 + 25 = 15 + 25
-12x = 40


-4x - 25 = 8x + 15
-4x - 25 + 4x = 8x + 15 + 4x
-25 = 12x + 15
-25 - 15 = 12x + 15 - 15
-40 = 12x


Question 2 options:

1) Becky made the error when she subtracted 8x

2) Becky made the error when she divided by 40

3) Tommy made the error when he added 4x

4) Tommy made the error when he added 15