Given:
Merchandise on sale = 20% off
Kelley saved = $10.
Find-: The original price.
Sol:
Let original price = x.
The 20% off then the price is:
[tex]\begin{gathered} \text{ 100 price then sale price =80} \\ \\ \text{ 1 price so sale price =}\frac{80}{100} \\ \\ \text{ original price x then sale price =}\frac{80}{100}\times x \\ \\ =0.8x \end{gathered}[/tex]Kelley saved $10 then.
[tex]\begin{gathered} x-0.8x=10 \\ \\ 0.2x=10 \\ \\ x=\frac{10}{0.2} \\ \\ x=50 \end{gathered}[/tex]So the original price is $50.
