The correct option is A x=12 & y=6
Given x+y=18−−−(i) and
x−2y=0−−−(ii)
Here, we use substitution method to solve the given system of equations.
From (ii) we get x=2y
Substitute the value of x in (i)
⟹2y+y=18
⟹3y=18
⟹y=6
Substitute the value of y in (i)
⟹x+6=18
x=12
∴x=12 & y=6