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2(5.6r-7.9)=26
We move all terms to the left:
2(5.6r-7.9)-(26)=0
We multiply parentheses
10r-15.8-26=0
We add all the numbers together, and all the variables
10r-41.8=0
We move all terms containing r to the left, all other terms to the right
10r=41.8
r=41.8/10
r=4+1/5.55555555556
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