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.5(16+12r)=12r=8
We move all terms to the left:
.5(16+12r)-(12r)=0
We add all the numbers together, and all the variables
.5(12r+16)-12r=0
We add all the numbers together, and all the variables
-12r+.5(12r+16)=0
We multiply parentheses
-12r+6r+8=0
We add all the numbers together, and all the variables
-6r+8=0
We move all terms containing r to the left, all other terms to the right
-6r=-8
r=-8/-6
r=1+1/3
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