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Algebra word problem involving production?

Question: "There are two machines that produce aluminum cans. The newer machine can produce 4200 cans in 210 minutes. It takes the older machine 280 minutes to produce 4200 cans. If the two machines work together how long will it take them to produce 4200 cans." So far I have this.

4200c=210m

4200c=280m Would I foil this? Or do I need to use another function? I left my textbook at my friends house.... :/

2 Answers

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  • AskJoe
    Lv 7
    8 years ago
    Favorite Answer

    210*280/(210+280)=120

  • Mike G
    Lv 7
    8 years ago

    t/210 + t/280 = 1

    280t+210t = 280*210

    t = 120 minutes

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