Question

mary is 4 years younger than bill,in ten years she will be 4/5 of the age of bill,what are their present ages​

Answer 1

Step-by-step explanation:

let the age of Mary = x

then,

age of boll = x+4

according to question,

(x+10) = 4/5(x +4 +10)

x + 4 = 4x/5 + 56/5

x - 4x/5 = 56/5 - 4

(5x-4x)/5 = (56 - 20)/5

x/5 = 36/5

x = 36

mary`s present age = 36

and, bill`s present age= 40