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A father is six time as old as his daughter . after 4 years he will be only four time as old as his daughter will be. what are their present age |
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Answer» Step-by-step explanation: 2 equations and 2 unknowns… in 4 years time (x + 4) is ( y + 4) x 4 ① x = 6y ② x + 4 = 4(y + 4) ③ x + 4 = 4y + 16 sub ① into ③ 6y + 4 = 4y + 16 therefore . . . 2y = 12 y = 6 and . . . x = 6y so . . . x = 36 ⓗⓞⓟⓔ ⓘⓣ ⓗⓔⓛⓟⓢ ⓤ .. |
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