623=-7(8x-9)

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Solution for 623=-7(8x-9) equation: 



623=-7(8x-9)

We move all terms to the left:

623-(-7(8x-9))=0



We calculate terms in parentheses: -(-7(8x-9)), so:

-7(8x-9)

We multiply parentheses

-56x+63

Back to the equation:

-(-56x+63)



We get rid of parentheses

56x-63+623=0

We add all the numbers together, and all the variables

56x+560=0

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

56x=-560

x=-560/56

x=-10

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