#### Explanation:

%50 is the same as $\frac{1}{2}$ so if you solve $x = n + x \cdot m$ where m is the fraction equivalent of the percentage and n is the price after the discount, $x = 2 + \frac{x}{2}$ so if you take $\frac{x}{2}$ from each side you get $\frac{x}{2} = 2$ which means $x = 4$

Apr 17, 2018

$4 #### Explanation: YOu can use direct proportion. 100%-50% = 50% The price of $2 represents 50%, how much is the 100%?
$\frac{2}{50} = \frac{x}{100}$
$x = \frac{100 \times 2}{50}$
x =$4 YOu could also have seen the the values on the right are double the values on the left. $\frac{2}{50} \times \frac{2}{2} = \frac{x}{100}$$x = 2 \times 2 = 4\$