13=3(x-5)-7x

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Solution for 13=3(x-5)-7x equation: 



13=3(x-5)-7x

We move all terms to the left:

13-(3(x-5)-7x)=0



We calculate terms in parentheses: -(3(x-5)-7x), so:

3(x-5)-7x

We add all the numbers together, and all the variables

-7x+3(x-5)

We multiply parentheses

-7x+3x-15

We add all the numbers together, and all the variables

-4x-15

Back to the equation:

-(-4x-15)



We get rid of parentheses

4x+15+13=0

We add all the numbers together, and all the variables

4x+28=0

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

4x=-28

x=-28/4

x=-7

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