42=s/9+40

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Solution for 42=s/9+40 equation: 



42=s/9+40

We move all terms to the left:

42-(s/9+40)=0

We get rid of parentheses

-s/9-40+42=0

We multiply all the terms by the denominator


-s-40*9+42*9=0

We add all the numbers together, and all the variables

-1s+18=0

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

-s=-18

s=-18/-1

s=+18

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