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3.19=r/4
We move all terms to the left:
3.19-(r/4)=0
We add all the numbers together, and all the variables
-(+r/4)+3.19=0
We get rid of parentheses
-r/4+3.19=0
We multiply all the terms by the denominator
-r+(3.19)*4=0
We add all the numbers together, and all the variables
-1r+12.76=0
We move all terms containing r to the left, all other terms to the right
-r=-12.76
r=-12.76/-1
r=12+0.76/1
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