Posted by ronie on .
kristyn is 4 yrs younger than mario.three years from now she will be two thirds as old as mario. find the present age

algebra 
Reiny,
NOW:
Mario  x
Kristyn  x4
3years from now:
Mario  x+3
Kristyn x1
"Three years from now, she will be 2/3 Mario's age"
> (x1) = (2/3)(x+3)
3x3 = 2x+6
x=0
So now Mario is 9 and Krystyn is 5
check out both conditions stated, it works