6-9r=78

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Solution for 6-9r=78 equation: 



6-9r=78

We move all terms to the left:

6-9r-(78)=0

We add all the numbers together, and all the variables

-9r-72=0

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

-9r=72

r=72/-9

r=-8

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