Solve for r
r=\frac{p+5}{3}
Solve for p
p=3r-5
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3r-5=p
Swap sides so that all variable terms are on the left hand side.
3r=p+5
Add 5 to both sides.
\frac{3r}{3}=\frac{p+5}{3}
Divide both sides by 3.
r=\frac{p+5}{3}
Dividing by 3 undoes the multiplication by 3.
Examples
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Matrix
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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