-7r+28=-3r+40

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Solution for -7r+28=-3r+40 equation: 



-7r+28=-3r+40

We move all terms to the left:

-7r+28-(-3r+40)=0

We get rid of parentheses

-7r+3r-40+28=0

We add all the numbers together, and all the variables

-4r-12=0

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

-4r=12

r=12/-4

r=-3

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