4+2r=15

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Solution for 4+2r=15 equation: 



4+2r=15

We move all terms to the left:

4+2r-(15)=0

We add all the numbers together, and all the variables

2r-11=0

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

2r=11

r=11/2

r=5+1/2

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