Two adjacent angles have a sum of 100°. The angles have measures 21
= 20° and 22 = (3x + 15)°. What equation can be used to solve for x? (1 point)
0 3x + 115 = 20
0 3x - 20 = 100
O 3x - 100 = 20
O 3x + 35 = 100
The equation that can be used to solve for x is:
3x + 15 + 20 = 100