Answer
$C=A(\frac{R}{5}+0.3)$
Work Step by Step
The given formula is
$\Rightarrow R=5(\frac{C}{A}-0.3)$
Divide each side by $5$.
$\Rightarrow \frac{R}{5}=\frac{5}{5}(\frac{C}{A}-0.3)$
Simplify.
$\Rightarrow \frac{R}{5}=\frac{C}{A}-0.3$
Add $0.3$ to each side.
$\Rightarrow \frac{R}{5}+0.3=\frac{C}{A}-0.3+0.3$
Simplify.
$\Rightarrow \frac{R}{5}+0.3=\frac{C}{A}$
Multiply each side by $A$.
$\Rightarrow A(\frac{R}{5}+0.3)=A\cdot \frac{C}{A}$
Simplify.
$\Rightarrow A(\frac{R}{5}+0.3)=C$
Hence, the solution is $C=A(\frac{R}{5}+0.3)$.