Question

The angles below are supplementary. What is the value of x?

Answer 1

I think the answer is 20 also

Answer 2

Hi there! The answer is x = 20°

The angles are supplementary, which means that the sum of the angles is 180°.

The sum of the angles also equals

`3x + 40 + 80`

Therefore, we get the following equation.

`3x + 40 + 80 = 180`

Collect terms

`3x + 120 = 180`

Subtract 120

`3x = 60`

Divide by 3

`x = 60 / 3 = 20`