Difference between revisions of "2019 AMC 8 Problems/Problem 22"
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==Solution 1== | ==Solution 1== | ||
| − | Lets suppose the amount of discount is x. That means (1-x)(1+x)=0.84; so 1-x^{2}=0.84, and x^{2}=0.16. x=0.4= | + | Lets suppose the amount of discount is x. That means (1-x)(1+x)=0.84; so 1-x^{2}=0.84, and $(x^{2})=0.16. x=0.4= |
==See Also== | ==See Also== | ||
Revision as of 17:45, 20 November 2019
Problem 22
A store increased the original price of a shirt by a certain percent and then decreased the new
price by the same amount. Given that the resulting price was 84% of the original price, by what
percent was the price increased and decreased?
Solution 1
Lets suppose the amount of discount is x. That means (1-x)(1+x)=0.84; so 1-x^{2}=0.84, and $(x^{2})=0.16. x=0.4=
See Also
| 2019 AMC 8 (Problems • Answer Key • Resources) | ||
| Preceded by Problem 6 |
Followed by Problem 23 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AJHSME/AMC 8 Problems and Solutions | ||
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