Question

Angles (x+40) and (x-20) are supplementary, find the value of x​

Answer 1

x = 80

Explanation:

supplementary angles sum to 180°

sum the 2 angles and equate to 180

x + 40 + x - 20 = 180

2x + 20 = 180 ( subtract 20 from both sides )

2x = 160 ( divide both sides by 2 )

x = 80