Two adjacent angles have a sum of 100°. The angles have measures ∠1 = 20° and ∠2 = (3x+15)°. What equation can be used to solve for x? (1 point)
A. 3x + 115 = 20
B. 3x - 20 = 100
C. 3x - 100 = 20
D. 3x + 35 = 100
To find the equation that can be used to solve for x, we need to use the given information that the sum of the two angles is 100°.
The measure of one angle is 20° (given as ∠1), and the measure of the other angle is (3x+15)° (given as ∠2).
So, the equation that represents the sum of the two angles is:
20 + (3x + 15) = 100
Simplifying this equation, we get:
3x + 35 = 100
Therefore, the correct equation to solve for x is:
D. 3x + 35 = 100