21=-6(7x+8)+5(-1+x)

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Solution for 21=-6(7x+8)+5(-1+x) equation: 



21=-6(7x+8)+5(-1+x)

We move all terms to the left:

21-(-6(7x+8)+5(-1+x))=0

We add all the numbers together, and all the variables

-(-6(7x+8)+5(x-1))+21=0



We calculate terms in parentheses: -(-6(7x+8)+5(x-1)), so:

-6(7x+8)+5(x-1)

We multiply parentheses

-42x+5x-48-5

We add all the numbers together, and all the variables

-37x-53

Back to the equation:

-(-37x-53)



We get rid of parentheses

37x+53+21=0

We add all the numbers together, and all the variables

37x+74=0

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

37x=-74

x=-74/37

x=-2

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