3x + (-2x) would be just subtracting 2x from 3x, so it would be 1x or x. Hope this helped<3
Answer:
b.
It's too short. Write at least 20 characters to explain it well
Answer:
The mistake she made was ; She didn't change the sign when subtracting -3/4 from both sides
She wrote 5/4+3/4 instead of 5/4-3/4
Step-by-step explanation:
Correct solution:

Subtract-3/4 from both sides

Simplify

4 * 2 = 8
8 + 5 = 13
B, is the correct answer