13=7x-(3x-1)

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Solution for 13=7x-(3x-1) equation: 



13=7x-(3x-1)

We move all terms to the left:

13-(7x-(3x-1))=0



We calculate terms in parentheses: -(7x-(3x-1)), so:

7x-(3x-1)

We get rid of parentheses

7x-3x+1

We add all the numbers together, and all the variables

4x+1

Back to the equation:

-(4x+1)



We get rid of parentheses

-4x-1+13=0

We add all the numbers together, and all the variables

-4x+12=0

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

-4x=-12

x=-12/-4

x=+3

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