30=s/4+21

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Solution for 30=s/4+21 equation: 



30=s/4+21

We move all terms to the left:

30-(s/4+21)=0

We get rid of parentheses

-s/4-21+30=0

We multiply all the terms by the denominator


-s-21*4+30*4=0

We add all the numbers together, and all the variables

-1s+36=0

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

-s=-36

s=-36/-1

s=+36

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