3+1.5r=15

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Solution for 3+1.5r=15 equation: 



3+1.5r=15

We move all terms to the left:

3+1.5r-(15)=0

We add all the numbers together, and all the variables

1.5r-12=0

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

1.5r=12

r=12/1.5

r=8

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