21=8x+36

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Solution for 21=8x+36 equation: 



21=8x+36

We move all terms to the left:

21-(8x+36)=0

We get rid of parentheses

-8x-36+21=0

We add all the numbers together, and all the variables

-8x-15=0

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

-8x=15

x=15/-8

x=-1+7/8

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