(r+5)+(2r+4)=90

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Solution for (r+5)+(2r+4)=90 equation: 



(r+5)+(2r+4)=90

We move all terms to the left:

(r+5)+(2r+4)-(90)=0

We get rid of parentheses

r+2r+5+4-90=0

We add all the numbers together, and all the variables

3r-81=0

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

3r=81

r=81/3

r=27

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