21=x/9+4

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Solution for 21=x/9+4 equation: 



21=x/9+4

We move all terms to the left:

21-(x/9+4)=0

We get rid of parentheses

-x/9-4+21=0

We multiply all the terms by the denominator


-x-4*9+21*9=0

We add all the numbers together, and all the variables

-1x+153=0

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

-x=-153

x=-153/-1

x=+153

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