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-11+8r=7-3
We move all terms to the left:
-11+8r-(7-3)=0
We add all the numbers together, and all the variables
8r-11-4=0
We add all the numbers together, and all the variables
8r-15=0
We move all terms containing r to the left, all other terms to the right
8r=15
r=15/8
r=1+7/8
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