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r/0.1-3=0.2+2r
We move all terms to the left:
r/0.1-3-(0.2+2r)=0
We add all the numbers together, and all the variables
r/0.1-(2r+0.2)-3=0
We get rid of parentheses
r/0.1-2r-0.2-3=0
We multiply all the terms by the denominator
r-2r*0.1-(0.2)*0.1-3*0.1=0
We add all the numbers together, and all the variables
r-2r*0.1-0.32=0
Wy multiply elements
r-0.2r-0.32=0
We add all the numbers together, and all the variables
0.8r-0.32=0
We move all terms containing r to the left, all other terms to the right
0.8r=0.32
r=0.32/0.8
r=0.32/0.8
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