-87=6x+3(1-7x)

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Solution for -87=6x+3(1-7x) equation: 



-87=6x+3(1-7x)

We move all terms to the left:

-87-(6x+3(1-7x))=0

We add all the numbers together, and all the variables

-(6x+3(-7x+1))-87=0



We calculate terms in parentheses: -(6x+3(-7x+1)), so:

6x+3(-7x+1)

We multiply parentheses

6x-21x+3

We add all the numbers together, and all the variables

-15x+3

Back to the equation:

-(-15x+3)



We get rid of parentheses

15x-3-87=0

We add all the numbers together, and all the variables

15x-90=0

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

15x=90

x=90/15

x=6

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