13+x=4-2x

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Solution for 13+x=4-2x equation: 



13+x=4-2x

We move all terms to the left:

13+x-(4-2x)=0

We add all the numbers together, and all the variables

x-(-2x+4)+13=0

We get rid of parentheses

x+2x-4+13=0

We add all the numbers together, and all the variables

3x+9=0

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

3x=-9

x=-9/3

x=-3

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