13=7x-3x

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Solution for 13=7x-3x equation: 



13=7x-3x

We move all terms to the left:

13-(7x-3x)=0

We add all the numbers together, and all the variables

-(+4x)+13=0

We get rid of parentheses

-4x+13=0

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

-4x=-13

x=-13/-4

x=3+1/4

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