x-87=8(2x+3)-21

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Solution for x-87=8(2x+3)-21 equation: 



x-87=8(2x+3)-21

We move all terms to the left:

x-87-(8(2x+3)-21)=0



We calculate terms in parentheses: -(8(2x+3)-21), so:

8(2x+3)-21

We multiply parentheses

16x+24-21

We add all the numbers together, and all the variables

16x+3

Back to the equation:

-(16x+3)



We get rid of parentheses

x-16x-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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