Jack is three years older than Jill. Three years ago, Jill's age was four-fifths of Jack's age. How old is each now?
x = Jill’s age now {Jack is three years older than Jill}x + 3 = Jack’s age now x - 3 = Jill’s age three years ago {subtracted three from current ages}x = Jack’s age three years ago x - 3 = (4/5)x {three years ago, Jill's age was four-fifths of Jack's age} 5x - 15 = 4x {multiplied entire equation by 5 to eliminate fraction} x = 15 {subtracted 4x and added 15 to each side} x + 3 = 18 {substituted 15, in for x, into x + 3} Jill is 15Jack is 18 Ask the House
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