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MAth

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jerry is 6 more than 3 times as old as his son.together they are 46 yrs old. how old is jerry. ans -36
I set up problem 6+3x=46 to start?

  • MAth - ,

    It is always a good practice to define the variables, in this case:
    son's age = x
    Jerry's age = 6+3x
    Together
    x + (6+3x) = 46
    ...

  • MAth - ,

    so x + 6+3x =46
    4x + 6-6 = 46 - 6
    4x/4 = 40/4
    x = 10 ???? it should be 36 what am I missing?

  • MAth - ,

    son's age = x
    Jerry's age = 6+3x

    "...how old is jerry. "

  • MAth - ,

    4x divided by 4 = x
    40 divided by 4 =10

  • MAth - ,

    if x = 10
    then
    6+3x = 6+30

  • MAth - ,

    got it, thanks

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