3(-1-7x)=-87

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



3(-1-7x)=-87

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-21x-3+87=0

We add all the numbers together, and all the variables

-21x+84=0

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

-21x=-84

x=-84/-21

x=+4

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