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4r+-8=3r+-8
We move all terms to the left:
4r+-8-(3r+-8)=0
We add all the numbers together, and all the variables
4r-(3r-8)-8+=0
We add all the numbers together, and all the variables
4r-(3r-8)=0
We get rid of parentheses
4r-3r+8=0
We add all the numbers together, and all the variables
r+8=0
We move all terms containing r to the left, all other terms to the right
r=-8
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