Question

Evaluate x + y + z for x = 2, y = -3, z = -4.

Answer 1

x+y+z

2+(-3)+(-4)

2-3-4

2-7

=-5

Answer 2

x=2
y= -3
z= -4
x+y+z= 2+(-3)+(-4)
x+y+z= -1+(-4)
x+y+z= -5

hope it helps you....