Question

If X = 2a – b – c , Y = 2b – c – a and Z = 2c – a – b , then X + Y + Z = ?​

Answer 1

Answer: 0

Step-by-step explanation:

Given

X = 2a - b - c

Y = 2b - c - a

Z = 2c - a - b

X + Y + Z  

= 2a - b - c + 2b - c - a + 2c - a - b

= (2a - a - a) + (2b - b - b) + (2c - c - c)    

[regroup the like terms so that it is easier to solve the problem]  

= 0 + 0 + 0

= 0

Hope it helps you :)