7x+2x-7=13-x

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Solution for 7x+2x-7=13-x equation: 



7x+2x-7=13-x

We move all terms to the left:

7x+2x-7-(13-x)=0

We add all the numbers together, and all the variables

7x+2x-(-1x+13)-7=0

We add all the numbers together, and all the variables

9x-(-1x+13)-7=0

We get rid of parentheses

9x+1x-13-7=0

We add all the numbers together, and all the variables

10x-20=0

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

10x=20

x=20/10

x=2

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