78=(-9x)-3(-56+12x)

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Solution for 78=(-9x)-3(-56+12x) equation: 



78=(-9x)-3(-56+12x)

We move all terms to the left:

78-((-9x)-3(-56+12x))=0

We add all the numbers together, and all the variables

-((-9x)-3(12x-56))+78=0



We calculate terms in parentheses: -((-9x)-3(12x-56)), so:

(-9x)-3(12x-56)

We multiply parentheses

(-9x)-36x+168

We get rid of parentheses

-9x-36x+168

We add all the numbers together, and all the variables

-45x+168

Back to the equation:

-(-45x+168)



We get rid of parentheses

45x-168+78=0

We add all the numbers together, and all the variables

45x-90=0

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

45x=90

x=90/45

x=2

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