87=-3(7x-4)-4x

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Solution for 87=-3(7x-4)-4x equation: 



87=-3(7x-4)-4x

We move all terms to the left:

87-(-3(7x-4)-4x)=0



We calculate terms in parentheses: -(-3(7x-4)-4x), so:

-3(7x-4)-4x

We add all the numbers together, and all the variables

-4x-3(7x-4)

We multiply parentheses

-4x-21x+12

We add all the numbers together, and all the variables

-25x+12

Back to the equation:

-(-25x+12)



We get rid of parentheses

25x-12+87=0

We add all the numbers together, and all the variables

25x+75=0

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

25x=-75

x=-75/25

x=-3

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