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anonymous

  • 5 years ago

Kim bought 4 shirts and 3 pairs of jeans for 109.85. Jim bought 6 shirts and 1 pair of jeans for 94.95 The shirts and the jeans all cost the same amount. What is the cost, in dollars, of one pair of jeans?

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  1. anonymous
    • 5 years ago
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    Damn, she likes clothes.

  2. anonymous
    • 5 years ago
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    If a is the cost of shirts and b is the cost of jeans:\[4a+3b=109.85\]\[6a+b=94.95\]You can just solve these equations simultaneously to get the answer.

  3. anonymous
    • 5 years ago
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    or write \[b=94.95-6a\] and substitute. either way

  4. anonymous
    • 5 years ago
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    That is solving them simultaneously.

  5. anonymous
    • 5 years ago
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    But do I want to substitute for b (cost of jeans) if i'm trying to find the cost of the jeans? Shouldn't i subsitute for a ?

  6. anonymous
    • 5 years ago
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    Yes, but sometimes its easier to find b first and then find a.

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