Answer:
x=35
Step-by-step explanation:
The angles are alternate interior angles. Alternate interior angles are equal if the lines are parallel.
3x+16 = 5x-54
Subtract 3x from each side
3x -3x+16 = 5x-3x-54
16 = 2x-54
Add 54 to each side
16+54 = 2x-54+54
70 = 2x
Divide each side by 2
70/2 = 2x/2
35 =x
