-3(x-8)-(x+5)=-21

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Solution for -3(x-8)-(x+5)=-21 equation: 



-3(x-8)-(x+5)=-21

We move all terms to the left:

-3(x-8)-(x+5)-(-21)=0

We add all the numbers together, and all the variables

-3(x-8)-(x+5)+21=0

We multiply parentheses

-3x-(x+5)+24+21=0

We get rid of parentheses

-3x-x-5+24+21=0

We add all the numbers together, and all the variables

-4x+40=0

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

-4x=-40

x=-40/-4

x=+10

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