Question 992445
Let x and y are the ages of two sisters.
x+y=20------(1)
x+2=3(y+2)=3y+6
x+2=3y+6
x-3y=4------(2)
From (1)x=20-y,substituting in (2)
20-y-3y=4
4y=16=>y=16/4=4
y=4
x=20-4=16
S0 the ages of two sisters are x=16yrs,y=4yrs