7r+9=5r+7

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



7r+9=5r+7

We move all terms to the left:

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

We get rid of parentheses

7r-5r-7+9=0

We add all the numbers together, and all the variables

2r+2=0

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

2r=-2

r=-2/2

r=-1

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