(5r-6)+(3r)=90

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Solution for (5r-6)+(3r)=90 equation: 



(5r-6)+(3r)=90

We move all terms to the left:

(5r-6)+(3r)-(90)=0

We add all the numbers together, and all the variables

3r+(5r-6)-90=0

We get rid of parentheses

3r+5r-6-90=0

We add all the numbers together, and all the variables

8r-96=0

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

8r=96

r=96/8

r=12

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