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

Answer:E
Step-by-step explanation:
The answer i pretty sure would be 3x
Answer:
120 degrees the sum of all angle is 720 degrees In the above