S/30-1=-r

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Solution for S/30-1=-r equation: 



/30-1=-S

We move all terms to the left:

/30-1-(-S)=0

We add all the numbers together, and all the variables

-(-1S)-1+/30=0

We get rid of parentheses

1S-1+/30=0

We multiply all the terms by the denominator


1S*30-1*30+=0

We add all the numbers together, and all the variables

1S*30=0

Wy multiply elements

30S=0

S=0/30

S=0

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