Question

isha is 5years younger than her brother. after 4 years,their ages will be in ratio 2:3,find their present ages

Answer 1

let x be the age of Isha and x+5 be that of her brother
then x+4/x+5+4=2/3
               3(x+4)=2(x+9)
               3x+12=2x+18
                3x-2x=18-12
                       x=6
so x+5=11 
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Answer 2

let the age of Isha's brother be x
the age of Isha is x-5
after 4 years age of her brother wii be  x+4
after 4 years age of isha = x-5+4
                                       = x-1
According to condition 
          x-1/x+4 = 2/3
          3(x-1) = 2(x+4)
         3x - 3 = 2x + 8
          3x - 2x = 8+3
              x = 11.
         the age of her brother is 11 years .
now the age of Isha= x-5
                                = 11-5
                                =6
    the age of Isha is 6 years.