Question

Find the value of x.

Answer 1

x = 20

Explanation:

==> 3x = 80 - x

=>Pass x to the other side the - sign into to +

==> 3x + x = 80

==> 4x = 80

==>
`x = (80)/(4)`

==> 80 ÷ 4

==> x = 20

Answer 2

Explanation:

Since they are vertical angles, they are equal to each other

3x=80-x

solve

4x=80

x=20