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-2(r+42/3)=91/2
We move all terms to the left:
-2(r+42/3)-(91/2)=0
We add all the numbers together, and all the variables
-2(r+14)-(+91/2)=0
We multiply parentheses
-2r-28-(+91/2)=0
We get rid of parentheses
-2r-28-91/2=0
We multiply all the terms by the denominator
-2r*2-91-28*2=0
We add all the numbers together, and all the variables
-2r*2-147=0
Wy multiply elements
-4r-147=0
We move all terms containing r to the left, all other terms to the right
-4r=147
r=147/-4
r=-36+3/4
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