Kristine is 4 years younger than Mario. Three years from now she will be twothirds as old as Mario. Find their present ages. x = Mario's age now x  4 = Kristine's age now x + 3 = Mario's age in 3 years {added 3 on to present age} x  1 = Kristine's age in 3 years {added 3 on to present age} x  1 = (2/3)(x + 3) {three years from now, she will be 2/3 his age} 3(x  1) = 2(x + 3) {multiplied entire equation by LCD, 3, to eliminate fraction} 3x  3 = 2x + 6 {used distributive property} x  3 = 6 {subtracted 2x from each side} x = 9 {added 3 to each side} x  4 = 5 {substituted 9, in for x, into x  4} Mario is 9 Kristine is 5  Algebra House Comments are closed.

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