21-(X-8)=4x-7

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Solution for 21-(X-8)=4x-7 equation: 



21-(X-8)=4X-7

We move all terms to the left:

21-(X-8)-(4X-7)=0

We get rid of parentheses

-X-4X+8+7+21=0

We add all the numbers together, and all the variables

-5X+36=0

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

-5X=-36

X=-36/-5

X=7+1/5

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