Question

Angle A and Angle B are complementary. Find the value of x if angle A = 3x-14 andangle B equals 5x-40

Answer 1

x = 18

Explanation:

All complementary angles add up to 90 degrees so set both expression to equal 90 :

3x - 14 + 5x - 40 = 90

Add like terms:

8x - 54 = 90

Solve:

8x - 54 = 90

8x = 144

x = 18