Concept explainers
Not every algebra word problem is naturally modeled with a strip diagram. Solve the following problem in any way that makes sense, and explain your solution:
Frannie has no money now, but she plans to save $D every week so that she can buy a toy she would like to have. Frannie figures that if she saves her money for 3 weeks, she will have $1 less than she needs to buy the toy, but if she saves her money for 4 weeks. she will have $3 more than she needs to buy the toy. How much is Frannie saving every week. and how much does the toy F rannie plans to buy cost?
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