Difference between revisions of "AoPS Wiki talk:Problem of the Day/July 27, 2011"
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You spent 10 dollars buying the coupon, so you must save 10 dollars on something else. So, <math> 0.15x=10 </math> and <math> x=10\div 0.15=66.67 </math> | You spent 10 dollars buying the coupon, so you must save 10 dollars on something else. So, <math> 0.15x=10 </math> and <math> x=10\div 0.15=66.67 </math> | ||
Revision as of 21:20, 26 July 2011
Problem
AoPSWiki:Problem of the Day/July 27, 2011
Solution
You spent 10 dollars buying the coupon, so you must save 10 dollars on something else. So, 
and 
