30+.80r=2.30r

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Solution for 30+.80r=2.30r equation:



30+.80r=2.30r
We move all terms to the left:
30+.80r-(2.30r)=0
We add all the numbers together, and all the variables
.80r-(+2.30r)+30=0
We get rid of parentheses
.80r-2.30r+30=0
We add all the numbers together, and all the variables
-1.5r+30=0
We move all terms containing r to the left, all other terms to the right
-1.5r=-30
r=-30/-1.5
r=+20

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