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Ricky wrote the following to show that his sister's age is 6 yrs. less than 3 times his age. Explain what he did wrong.
Give the correct expression Let a stand for my age My sister's age a/3-6

  • Math -

    ricky's age
    sister's age:
    6 less than 3 times rick's age ----> 3a - 6

    I would never ask for an "explanation" of somebody's illogical thinking

  • Math -

    Richard is 6 years older than Lisa, and in 5 years the sum of their ages will be twice as much as the sum of their ages 4 years ago. Find their present ages.

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