Answer:
x = 35
Step-by-step explanation:
[tex]40 + 2x + 2x = 180[/tex]
Subtract 40 on both sides.
[tex]2x + 2x = 140[/tex]
[tex]4x = 140[/tex]
Divide with 4 on both sides.
[tex]x = 35[/tex]