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4(r-2)-3r=-4+7
We move all terms to the left:
4(r-2)-3r-(-4+7)=0
We add all the numbers together, and all the variables
4(r-2)-3r-3=0
We add all the numbers together, and all the variables
-3r+4(r-2)-3=0
We multiply parentheses
-3r+4r-8-3=0
We add all the numbers together, and all the variables
r-11=0
We move all terms containing r to the left, all other terms to the right
r=11
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