3x+40+(x+20)=180

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Solution for 3x+40+(x+20)=180 equation: 



3x+40+(x+20)=180

We move all terms to the left:

3x+40+(x+20)-(180)=0

We add all the numbers together, and all the variables

3x+(x+20)-140=0

We get rid of parentheses

3x+x+20-140=0

We add all the numbers together, and all the variables

4x-120=0

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

4x=120

x=120/4

x=30

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