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NCMom

  • 3 years ago

This a word problem about candy that I have gotten to two equations... 40x +100 y = 125 80x+84y=163 I dont know how to eliminate a variable or solve...thanks

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  1. karatechopper
    • 3 years ago
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    Can you tell me what the Word problem was?

  2. NCMom
    • 3 years ago
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    ok

  3. NCMom
    • 3 years ago
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    40 candy bars and 100 drinks cost $125 and 80 candy bars and 84 drinks cost $163..how much is each candy bar?

  4. CalebBeavers
    • 3 years ago
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    Solve for x or y in one of the equations

  5. NCMom
    • 3 years ago
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    x= 25 - 5/2 y ?

  6. NCMom
    • 3 years ago
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    x= 5/8 y?

  7. CalebBeavers
    • 3 years ago
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    40x+100y=125 100y=-40x+125 y=-2/5x+5/4

  8. NCMom
    • 3 years ago
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    ok

  9. CalebBeavers
    • 3 years ago
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    Now you know what y is so plug that into the other equation and solve for x 80x+84(-2/5x+5/4)=163

  10. NCMom
    • 3 years ago
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    Thx.

  11. NCMom
    • 3 years ago
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    right..Understand the theory-just seems overly complicated...usually the numbers are all nice and round and even... 84 times negative 2/5x + 5/4 makes my head spin..

  12. CalebBeavers
    • 3 years ago
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    Well fractions just multiply straight across top and bottom....think of 84 as 84/1

  13. NCMom
    • 3 years ago
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    Thanks Caleb.

  14. CalebBeavers
    • 3 years ago
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    What do you get for your answer?

  15. NCMom
    • 3 years ago
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    I dont...gonna let him finish the math and thanks for your help.

  16. NCMom
    • 3 years ago
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    75 cents and 1.25!!

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