Solve for r
r = \frac{3}{2} = 1\frac{1}{2} = 1.5
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r-4=-\frac{5}{2}
Fraction \frac{-5}{2} can be rewritten as -\frac{5}{2} by extracting the negative sign.
r=-\frac{5}{2}+4
Add 4 to both sides.
r=-\frac{5}{2}+\frac{8}{2}
Convert 4 to fraction \frac{8}{2}.
r=\frac{-5+8}{2}
Since -\frac{5}{2} and \frac{8}{2} have the same denominator, add them by adding their numerators.
r=\frac{3}{2}
Add -5 and 8 to get 3.
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