Riza was 25 when her first born son was born.Today the sum of their age is 105.How old is Riza and Her son now

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Riza was 25 when her first born son was born.Today the sum of their age is 105.How old is Riza and Her son now

2007-07-26 01:12:45 · 3 answers · asked by Michael Ray G 1 in Science & Mathematics ➔ Mathematics

3 answers

let her son be x years old

25 + x = riza's age now

therefore, sum of ages now = 105 = x + (25+x)

105 = 2x + 25
x = 40 = son's age

riza's age = 25+40 = 65

2007-07-26 01:17:38 · answer #1 · answered by cherrypassion 2 · 0⤊ 0⤋

Let x be the age of the son.

25 + 2x = 105

2x = 105 - 25 = 80

x = 40

So, Riza is 65 and her son is 40 years now.

2007-07-26 08:16:42 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋

Riza is 65 and son is 40

105 -25 = 80
80 / 2 = 40 (son's age)
40 +25 = 65 (Riza's age)

2007-07-26 08:24:02 · answer #3 · answered by Anonymous · 0⤊ 0⤋