7r+5r+5r-12r=5

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Solution for 7r+5r+5r-12r=5 equation: 



7r+5r+5r-12r=5

We move all terms to the left:

7r+5r+5r-12r-(5)=0

We add all the numbers together, and all the variables

5r-5=0

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

5r=5

r=5/5

r=1

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