Question

If x*y=3, y+z=5, z+x=4 then y=_ a)1 b)2 c)3 d) 4​

Answer 1

Answer:

x = 4-z

and z = 5-y

put these values in Equation 1

(4-5+y)(y) = 3

(y-1)y = 3

y^2 - y - 3 = 0 then put all the value and check for correct one