8.9r-8=7.9r-8

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Solution for 8.9r-8=7.9r-8 equation: 



8.9r-8=7.9r-8

We move all terms to the left:

8.9r-8-(7.9r-8)=0

We get rid of parentheses

8.9r-7.9r+8-8=0

We add all the numbers together, and all the variables

r=0

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