SOLUTION: i am 3 times as old as my daughter. in 12 years time i will only be twice as old as my daughter. how old am i now?

Algebra ->  Conversion and Units of Measurement -> SOLUTION: i am 3 times as old as my daughter. in 12 years time i will only be twice as old as my daughter. how old am i now?      Log On


   

Question 663368: i am 3 times as old as my daughter. in 12 years time i will only be twice as old as my daughter. how old am i now?
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
x = your age
y = daughter's age

x = 3y
x + 12 = 2(y + 12)

Substitute x = 3y into the second equation.

3y + 12 = 2(y + 12)
3y + 12 = 2y + 24
y = 12

Your daughter is 12 and you are 36.