Jack has 40 dollars more than Jill. Jack gives 20 dollars to Jill. Then they have the same amount of money. I found the answer by method of exhaustion, but how can this be solved more elegantly?
Struggling with a question at high school level
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algebra-precalculus
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0OOps, forgot the question. Sorry! How much money did Jack and Jill start with? – 2011-08-24