SOLUTION: Liza’s age is four less than thrice the age of her younger sister. If two years ago, her younger sister is seven years old, how old is Liza now?

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Question 1169427: Liza’s age is four less than thrice the age of her younger sister. If two years ago, her
younger sister is seven years old, how old is Liza now?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
Liza is 3x-4 while her sister's age is x.

If x-2=7 then x=9.

Liza is 23.
Answer by ikleyn(52787)   (Show Source): You can put this solution on YOUR website!
.

If two years ago, the younger sister is seven years old,

    hence, the younger sister is 9 years old now.



Thrice 9 years is 27 years, and 4 less than 27 years is 23 years.


ANSWER.  Liza is 23 years old now.

Solved.




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