81=3x-7(x-7)

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Solution for 81=3x-7(x-7) equation: 



81=3x-7(x-7)

We move all terms to the left:

81-(3x-7(x-7))=0



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

3x-7(x-7)

We multiply parentheses

3x-7x+49

We add all the numbers together, and all the variables

-4x+49

Back to the equation:

-(-4x+49)



We get rid of parentheses

4x-49+81=0

We add all the numbers together, and all the variables

4x+32=0

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

4x=-32

x=-32/4

x=-8

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