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2.4r-5.28=7.32
We move all terms to the left:
2.4r-5.28-(7.32)=0
We add all the numbers together, and all the variables
2.4r-12.6=0
We move all terms containing r to the left, all other terms to the right
2.4r=12.6
r=12.6/2.4
r=5+0.6/2.4
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