Question

If Peter pays $84 to buy a watch after a discount of 20%, find the original price of the watch.​

Answer 1

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Answer 2

Step-by-step explanation:

Let $x be the original price of the watch. Then $(x-84) is the sum of a discount.

So we obtain the equation:

x - 84 = 0.2 x; \newline x - 0.2x = 84; \newline 0.8x = 84; \newline x =\frac{84}{0.8}; \newline x = 105x−84=0.2x;

x−0.2x=84;

0.8x=84;

x=

0.8

84

;

x=105

Thus, the original price of the watch is $105.