Solve for r
r=-\frac{1}{5}=-0.2
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-1=5r
Combine 3r and 2r to get 5r.
5r=-1
Swap sides so that all variable terms are on the left hand side.
r=\frac{-1}{5}
Divide both sides by 5.
r=-\frac{1}{5}
Fraction \frac{-1}{5} can be rewritten as -\frac{1}{5} by extracting the negative sign.
Examples
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Matrix
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Limits
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