-8x+21=2x-7(3x+8)

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Solution for -8x+21=2x-7(3x+8) equation: 



-8x+21=2x-7(3x+8)

We move all terms to the left:

-8x+21-(2x-7(3x+8))=0



We calculate terms in parentheses: -(2x-7(3x+8)), so:

2x-7(3x+8)

We multiply parentheses

2x-21x-56

We add all the numbers together, and all the variables

-19x-56

Back to the equation:

-(-19x-56)



We get rid of parentheses

-8x+19x+56+21=0

We add all the numbers together, and all the variables

11x+77=0

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

11x=-77

x=-77/11

x=-7

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