Question 930224
x = daughter's age now
3x = Mr. Edwards' age now {he is 3 times his daughter}


x + 15 = daughter in 15 years {added 15 onto daughter's current age}
3x + 15 = Mr. Edwards in 15 years {added 15 onto Mr. Edwards' current age}


x + 15 + 3x + 15 = 86 {sum of their ages, in 15 years, will be 86}
4x + 30 = 86 {combined like terms}
4x = 56 {subtracted 30 from each side}
x = 14 {divided each side by 4}
3x = 42 {substituted 14, in for x, into 3x}


His daughter is 14 and Mr. Edwards is 42, and
Mr. Edwards was 28 when his daughter was born {subtracted 14 from 42}
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