(x+40)+(3x-80)=180

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Solution for (x+40)+(3x-80)=180 equation: 



(x+40)+(3x-80)=180

We move all terms to the left:

(x+40)+(3x-80)-(180)=0

We get rid of parentheses

x+3x+40-80-180=0

We add all the numbers together, and all the variables

4x-220=0

We move all terms containing x to the left, all other terms to the right

4x=220

x=220/4

x=55

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