5r-2(-4r+7)=90

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Solution for 5r-2(-4r+7)=90 equation: 



5r-2(-4r+7)=90

We move all terms to the left:

5r-2(-4r+7)-(90)=0

We multiply parentheses

5r+8r-14-90=0

We add all the numbers together, and all the variables

13r-104=0

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

13r=104

r=104/13

r=8

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