Question

Find the value of x 7x° (x+20)°

Answer 1

the value of x will equal 20

Answer 2

the angles are supplementary angles.
Straight angle is 180°

7x+x+20=180
like terms
8x+20=180
Subtract
8x=160
Divide
x=20

The first angle (7x) is 140
7(20)= 140

and the second angle is(x+20) is 40
20+20=40

hope this helps