Question

Riyaz's mother is 7 times older than him . 4 years from now , she will be four times as old as Riyaz will be then be. what are their present ages.

Answer 1

$let \: riya \: mother \: age \: = x \\ let \: riyaz \: age = y \\ according \: to \: question \: \\ x = 7y - - - - 1 \\ after \: four \: years \\ riya \: mother \: will \: be = x + 4 \\ riya \: will \: be \: = y + 4 \\ according \: to \: question \\ x + 5 = 4(y + 5) \\ x + 5 = 4y + 20 \\ x - 4y = 20 - 5 \\ x - 4y = 15 - - - - 2 \\ from \: equation \: first \: and \: second \: \\ x - 7y = 0 \\ x - 4y = 15 \\ by \: elimination \: method \\ - 3y = - 15 \\ y = 5 \\ from \: equation \: first \\ x = 7y \\ x = 7 \times 5 \\ x = 35 \: answer$
so riyaz mother age is 35 years and riyaz age is 5 years.....

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Answer 2

Step-by-step explanation:

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