3r-r+5=15

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Solution for 3r-r+5=15 equation: 



3r-r+5=15

We move all terms to the left:

3r-r+5-(15)=0

We add all the numbers together, and all the variables

2r-10=0

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

2r=10

r=10/2

r=5

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