Solve for x
x=2\left(r-1\right)
Solve for r
r=\frac{x+2}{2}
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r=1+\frac{1}{2}x
Divide each term of 2+x by 2 to get 1+\frac{1}{2}x.
1+\frac{1}{2}x=r
Swap sides so that all variable terms are on the left hand side.
\frac{1}{2}x=r-1
Subtract 1 from both sides.
\frac{\frac{1}{2}x}{\frac{1}{2}}=\frac{r-1}{\frac{1}{2}}
Multiply both sides by 2.
x=\frac{r-1}{\frac{1}{2}}
Dividing by \frac{1}{2} undoes the multiplication by \frac{1}{2}.
x=2r-2
Divide r-1 by \frac{1}{2} by multiplying r-1 by the reciprocal of \frac{1}{2}.
r=1+\frac{1}{2}x
Divide each term of 2+x by 2 to get 1+\frac{1}{2}x.
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