15+5r=-9+7r

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Solution for 15+5r=-9+7r equation: 



15+5r=-9+7r

We move all terms to the left:

15+5r-(-9+7r)=0

We add all the numbers together, and all the variables

5r-(7r-9)+15=0

We get rid of parentheses

5r-7r+9+15=0

We add all the numbers together, and all the variables

-2r+24=0

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

-2r=-24

r=-24/-2

r=+12

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