If x + y = 6, y + z = 4 and z + x = 2 then 2y - z

If x + y = 6, y + z = 4 and z + x = 2 then 2y - z - x ?

A 0

B 2

C 8

D 6

Correct Answer: Option D

x + y = 6, y + z = 4

so, x - z = 6 - 4

again x + z = 2

So, x = 2

y = 4, z = 0

Therefore, 2y - z - x = 2*4 - 2- 0 = 6