15=1+4r+3r

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Solution for 15=1+4r+3r equation: 



15=1+4r+3r

We move all terms to the left:

15-(1+4r+3r)=0

We add all the numbers together, and all the variables

-(7r+1)+15=0

We get rid of parentheses

-7r-1+15=0

We add all the numbers together, and all the variables

-7r+14=0

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

-7r=-14

r=-14/-7

r=+2

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