Answer:
x = 39
Step-by-step explanation:
The two angles will be equal when the lines are parallel
4x-24 = 3x+15
Subtract 3x from each side
4x-24-3x = 3x+15-3x
x-24 = 15
Add 24 to each side
x-24+24 = 15+24
x=39
Since these are alternate interior angles they should be set equal to each other so
4x-24=3x+15
Now simplify to get...
