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r/3.5=-9.2
We move all terms to the left:
r/3.5-(-9.2)=0
We add all the numbers together, and all the variables
r/3.5+9.2=0
We multiply all the terms by the denominator
r+(9.2)*3.5=0
We add all the numbers together, and all the variables
r+32.2=0
We move all terms containing r to the left, all other terms to the right
r=-32.2
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