Question

y is older than x by 7 years 15 years back x's age was 3/4 of y's age. There present age are

Answer 1

y=x+7
=> x=y-7

(y-15)*3/4=x-15

(y-15)*3/4=(y-7)-15

3y-45=4y-88

y=43

x=y-7=43-7=36

clearly 15 yrs earlier y was 28 yrs old and x was 21 yrs old also as given in question

3/4*y=4)4*28= 21 yrs

Answer 2

Answer:

y= x+7

x = y - 7

(y-15) 3/4 = x-15

(y -15 ) 3/4 = y-7 -15

y = 43

x= 43-7

x = 36