Question

Two angles are complementary. The measure of ∠ABC is x° and the measure of ∠DBC is (3x + 20)°. What is the value of x? pls help asap

Answer 1

x = 17.5°

Explanation:

complementary means their sum is 90°.

x + 3x + 20° = 90°

4x = 70°

x = 17.5°