8r+9=7

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Solution for 8r+9=7 equation: 



8r+9=7

We move all terms to the left:

8r+9-(7)=0

We add all the numbers together, and all the variables

8r+2=0

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

8r=-2

r=-2/8

r=-1/4

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