21=x/15

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Solution for 21=x/15 equation: 



21=x/15

We move all terms to the left:

21-(x/15)=0

We add all the numbers together, and all the variables

-(+x/15)+21=0

We get rid of parentheses

-x/15+21=0

We multiply all the terms by the denominator


-x+21*15=0

We add all the numbers together, and all the variables

-1x+315=0

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

-x=-315

x=-315/-1

x=+315

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