-3(1+7x)-3=-90

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Solution for -3(1+7x)-3=-90 equation: 



-3(1+7x)-3=-90

We move all terms to the left:

-3(1+7x)-3-(-90)=0

We add all the numbers together, and all the variables

-3(7x+1)-3-(-90)=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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