21-8(x+3)=3+7x

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Solution for 21-8(x+3)=3+7x equation: 



21-8(x+3)=3+7x

We move all terms to the left:

21-8(x+3)-(3+7x)=0

We add all the numbers together, and all the variables

-8(x+3)-(7x+3)+21=0

We multiply parentheses

-8x-(7x+3)-24+21=0

We get rid of parentheses

-8x-7x-3-24+21=0

We add all the numbers together, and all the variables

-15x-6=0

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

-15x=6

x=6/-15

x=-2/5

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