Solve for r
r = \frac{7}{2} = 3\frac{1}{2} = 3.5
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3r-2-r=5
Subtract r from both sides.
2r-2=5
Combine 3r and -r to get 2r.
2r=5+2
Add 2 to both sides.
2r=7
Add 5 and 2 to get 7.
r=\frac{7}{2}
Divide both sides by 2.
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