3r-7r=7+5r

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Solution for 3r-7r=7+5r equation: 



3r-7r=7+5r

We move all terms to the left:

3r-7r-(7+5r)=0

We add all the numbers together, and all the variables

3r-7r-(5r+7)=0

We add all the numbers together, and all the variables

-4r-(5r+7)=0

We get rid of parentheses

-4r-5r-7=0

We add all the numbers together, and all the variables

-9r-7=0

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

-9r=7

r=7/-9

r=-7/9

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