Answer:
72
Step-by-step explanation:
angle 3 and angle 7 are alternate interior angles so they are equal to each other
we setup the equation and solve for x
2x+40=3x+24
step 1subtract 2x from each side
40=x=24
step 2 subtract 24 from each side
x=16
then we plug in x to find the value of angle 3
2(16)+20
angle 3 = 72
