15=4x+5(x-15)

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Solution for 15=4x+5(x-15) equation: 



15=4x+5(x-15)

We move all terms to the left:

15-(4x+5(x-15))=0



We calculate terms in parentheses: -(4x+5(x-15)), so:

4x+5(x-15)

We multiply parentheses

4x+5x-75

We add all the numbers together, and all the variables

9x-75

Back to the equation:

-(9x-75)



We get rid of parentheses

-9x+75+15=0

We add all the numbers together, and all the variables

-9x+90=0

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

-9x=-90

x=-90/-9

x=+10

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