Question

The figure below shows the relationship between two supplementary angles.

Which of the following represents the value of x and a?

Answer 1

1) x=20

2) a=28

Explanation:

1) 6x+3x=180

9x=180

x=180÷9

x=20

2) 50+2x+3x-10=180

40+5x=180

5x=180-40

5x=140

x=140÷5

x=28