7=9r+4

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Solution for 7=9r+4 equation: 



7=9r+4

We move all terms to the left:

7-(9r+4)=0

We get rid of parentheses

-9r-4+7=0

We add all the numbers together, and all the variables

-9r+3=0

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

-9r=-3

r=-3/-9

r=1/3

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