21=x/8+15

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Solution for 21=x/8+15 equation: 



21=x/8+15

We move all terms to the left:

21-(x/8+15)=0

We get rid of parentheses

-x/8-15+21=0

We multiply all the terms by the denominator


-x-15*8+21*8=0

We add all the numbers together, and all the variables

-1x+48=0

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

-x=-48

x=-48/-1

x=+48

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