Answer:
They added +3x instead of subtracting it in the first step.
Step-by-step explanation:
Instead:
5x + 2 = 3x - 8
-3x -3x
----------------------
2x + 2 = -8
-2 -2
-----------------
2x = -10
/ 2 / 2
-----------
1x = -5
---------
x = -5
