87=-1+4(1+3x)

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Solution for 87=-1+4(1+3x) equation: 



87=-1+4(1+3x)

We move all terms to the left:

87-(-1+4(1+3x))=0

We add all the numbers together, and all the variables

-(-1+4(3x+1))+87=0



We calculate terms in parentheses: -(-1+4(3x+1)), so:

-1+4(3x+1)

determiningTheFunctionDomain
4(3x+1)-1

We multiply parentheses

12x+4-1

We add all the numbers together, and all the variables

12x+3

Back to the equation:

-(12x+3)



We get rid of parentheses

-12x-3+87=0

We add all the numbers together, and all the variables

-12x+84=0

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

-12x=-84

x=-84/-12

x=+7

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