21=x/5+7

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Solution for 21=x/5+7 equation: 



21=x/5+7

We move all terms to the left:

21-(x/5+7)=0

We get rid of parentheses

-x/5-7+21=0

We multiply all the terms by the denominator


-x-7*5+21*5=0

We add all the numbers together, and all the variables

-1x+70=0

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

-x=-70

x=-70/-1

x=+70

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