# Mary is twice older than her sister. In 5 years time, she will be 2 years older than her sister find how old are they both now.

2
by doyal

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by doyal

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so by 1 stament x=2y

and by 2 stament x+5=y+5+2

x-y=2

so by solving eqution we get,2y-y=2 so y=2 and x=4

mary =4yrs sister =2 yrs

solution :

Let present age of Mary's sister = x

therefore Present age of Mary = y = 2x

After 5 years ,

Mary's Sisters age = x+5

Mary's age = 2x+5

According to Question ,

Mary's age = Mary's Sisters age + two years

2x+5 = (x+5 ) + 2

2x+5 = x+5+2

2x = x+7 -5

2x-x = 7-5

hence

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