13+2x=7-x

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



13+2x=7-x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

2x+1x-7+13=0

We add all the numbers together, and all the variables

3x+6=0

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

3x=-6

x=-6/3

x=-2

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