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2r-15/4+3r=25/4
We move all terms to the left:
2r-15/4+3r-(25/4)=0
We add all the numbers together, and all the variables
2r+3r-15/4-(+25/4)=0
We add all the numbers together, and all the variables
5r-15/4-(+25/4)=0
We get rid of parentheses
5r-15/4-25/4=0
We multiply all the terms by the denominator
5r*4-15-25=0
We add all the numbers together, and all the variables
5r*4-40=0
Wy multiply elements
20r-40=0
We move all terms containing r to the left, all other terms to the right
20r=40
r=40/20
r=2
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