Angle ABC and angle DEF are complementary angles. The measure of angle ABC is twice the measure of angle DEF.

Which equation could be used to find, x, the measure of angle DEF?

Responses

A x + x = 90°x + x = 90°

B 2x + x = 180°2 x + x = 180°

C 2x + x = 90°
2 x + x = 90°

D x + x = 180°