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9=r-855/14
We move all terms to the left:
9-(r-855/14)=0
We add all the numbers together, and all the variables
-(+r-855/14)+9=0
We get rid of parentheses
-r+9+855/14=0
We multiply all the terms by the denominator
-r*14+855+9*14=0
We add all the numbers together, and all the variables
-r*14+981=0
Wy multiply elements
-14r+981=0
We move all terms containing r to the left, all other terms to the right
-14r=-981
r=-981/-14
r=70+1/14
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