I got a little stuck on this. Need a bit of help. Fast!

Question

Use the given measures of  ∠A and  ∠B to answer the following questions.

. m ∠A=20°

. m ∠B=(2x)°

Part B

Write an equation when  ∠A and  ∠B are complementary angles. Solve the equation for x, showing your work. What is the measure of  ∠B?

Answer 1

a= measure of ∠A = 20°

b=measure of ∠B = (2x)°

a+b=90°

20 + 2x = 90

2x = 70

x=35°