13=(-4)x+9

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



13=(-4)x+9

We move all terms to the left:

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



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

(-4)x+9

We multiply parentheses

-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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