15r+15=20r

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Solution for 15r+15=20r equation: 



15r+15=20r

We move all terms to the left:

15r+15-(20r)=0

We add all the numbers together, and all the variables

-5r+15=0

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

-5r=-15

r=-15/-5

r=+3

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