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math

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three apples and 2 ponkans cost P51. two apples and 3 ponkans cost P46.50. how much will half a dozen apple and half a dozen ponkans cost?

  • math - ,

    one way:

    3a+2p = 51
    2a+3p = 46.50
    add them up:
    5a+5p = 97.50
    multiply by 6/5:
    6a+6p = 97.0 * 6/5 = 117.00
    note that we didn't have to know how much each item cost.

    another way:

    multiply 1st by 2 and 2nd by 3 to get
    6a+4p = 102
    6a+9p = 139.50
    subtract 1st from 2nd to get
    5p = 37.50
    p = 7.50
    a = 12.00
    6a+6p = 72.00 + 45.00 = 117.00

  • math - ,

    thanks so much... but what if the cost of each ponkan and apples is asked? what will be the solution?

  • math - ,

    excuse me???

    look at the second solution, where I actually figure the cost of each.

  • math - ,

    yeah its there...thanks a lot...

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