-3(1+4x)=21-8x

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Solution for -3(1+4x)=21-8x equation: 



-3(1+4x)=21-8x

We move all terms to the left:

-3(1+4x)-(21-8x)=0

We add all the numbers together, and all the variables

-3(4x+1)-(-8x+21)=0

We multiply parentheses

-12x-(-8x+21)-3=0

We get rid of parentheses

-12x+8x-21-3=0

We add all the numbers together, and all the variables

-4x-24=0

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

-4x=24

x=24/-4

x=-6

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