Question

Rui Feng is twice as old as Raj and Khairul is 7 years younger than Rui Feng.
If the sum of their ages is 38 years, find their respective ages?

Answer 1

Step-by-step explanation:

let the age of Rui Feng be x , raj's be y and khairul be z

given rui is 2×raj

in terms of x, we can write: x/2 = y —(eq1)

the age of khairul is x-7 =z —(eq2)

given the sum of their age is 38

x+y+z=38

substituting the eq 1&2we get,

(x/2 )+ (x-7)+x=38

x+2(x-7)+2x =38

5x -14=76

x=18

age of run feng is 18

age of raj is 9

age of khairul is 11