13=4x-(-9)

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Solution for 13=4x-(-9) equation: 



13=4x-(-9)

We move all terms to the left:

13-(4x-(-9))=0



We calculate terms in parentheses: -(4x-(-9)), so:

4x-(-9)

We add all the numbers together, and all the variables

4x+9

Back to the equation:

-(4x+9)



We get rid of parentheses

-4x-9+13=0

We add all the numbers together, and all the variables

-4x+4=0

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

-4x=-4

x=-4/-4

x=1

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