Solve for t
t=100r-220
Solve for r
r=\frac{t}{100}+2.2
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0.01t+2.2=r
Swap sides so that all variable terms are on the left hand side.
0.01t=r-2.2
Subtract 2.2 from both sides.
\frac{0.01t}{0.01}=\frac{r-2.2}{0.01}
Multiply both sides by 100.
t=\frac{r-2.2}{0.01}
Dividing by 0.01 undoes the multiplication by 0.01.
t=100r-220
Divide r-2.2 by 0.01 by multiplying r-2.2 by the reciprocal of 0.01.
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