10(r+3)=90

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Solution for 10(r+3)=90 equation: 



10(r+3)=90

We move all terms to the left:

10(r+3)-(90)=0

We multiply parentheses

10r+30-90=0

We add all the numbers together, and all the variables

10r-60=0

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

10r=60

r=60/10

r=6

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