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r-12/9=171/3
We move all terms to the left:
r-12/9-(171/3)=0
We add all the numbers together, and all the variables
r-12/9-57=0
We add all the numbers together, and all the variables
r-57-12/9=0
We multiply all the terms by the denominator
r*9-12-57*9=0
We add all the numbers together, and all the variables
r*9-525=0
Wy multiply elements
9r-525=0
We move all terms containing r to the left, all other terms to the right
9r=525
r=525/9
r=58+1/3
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