Answer:
A. 32
Step-by-step explanation:
The two angles are equal to each other so you can set them equal and solve
2x+57=6x-71
Add 71 to both sides
2x+57+71=6x+0
2x+128=6x
Subtract 2x from both sides
128=6x-2x
128=4x
Divide 4 from both sides
128/4=x
32=x
