r/6+42=90r/6+42=90

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Solution for r/6+42=90r/6+42=90 equation: 



r/6+42=90r/6+42=90

We move all terms to the left:

r/6+42-(90r/6+42)=0

We get rid of parentheses

r/6-90r/6-42+42=0

We multiply all the terms by the denominator


r-90r-42*6+42*6=0

We add all the numbers together, and all the variables

-89r=0

r=0/-89

r=0

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