Using linear pairs,
By the exterior angle theorem,
Answer:
x = 18
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
x+x+x=54
(x+x+x)=54(Combine Like Terms)
3x=54
3x=54
Step 2: Divide both sides by 3.
3x 3
=
54
3
x=18
Answer:
x=18
15x12=180
180$ simple unless u have a different way to do it
y=3x-20 thats ur answer good luck