SOLUTION: Two sisters are presently 2 years old and 12 years old. How many years will have to pass before the elder sister is 1 1/2 times the age of the younger sister?

Question 1174972: Two sisters are presently 2 years old and 12 years old. How many years will have to pass before the elder sister is 1 1/2 times the age of the younger sister?
Answer by ikleyn(52887) (Show Source): You can put this solution on YOUR website!
.


x years later


    12 + x = 1.5*(2 + x)


It is your basic equation.

Simplify and solve it


    12 + x = 3 + 1.5x

    12 - 3 = 1.5x - x

       9   = 0.5x

       x   =   = 18.


ANSWER.  18 years later.

Solved.

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