40=7(-7+7x)-(8x-7)

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Solution for 40=7(-7+7x)-(8x-7) equation: 



40=7(-7+7x)-(8x-7)

We move all terms to the left:

40-(7(-7+7x)-(8x-7))=0

We add all the numbers together, and all the variables

-(7(7x-7)-(8x-7))+40=0



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

7(7x-7)-(8x-7)

We multiply parentheses

49x-(8x-7)-49

We get rid of parentheses

49x-8x+7-49

We add all the numbers together, and all the variables

41x-42

Back to the equation:

-(41x-42)



We get rid of parentheses

-41x+42+40=0

We add all the numbers together, and all the variables

-41x+82=0

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

-41x=-82

x=-82/-41

x=+2

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