2x+x=180-3x

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Solution for 2x+x=180-3x equation: 



2x+x=180-3x

We move all terms to the left:

2x+x-(180-3x)=0

We add all the numbers together, and all the variables

2x+x-(-3x+180)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

3x+3x-180=0

We add all the numbers together, and all the variables

6x-180=0

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

6x=180

x=180/6

x=30

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