Solve the following systems:

Question

1) x+z=2
2x+y=3
X-y+z=1

Answer 1

z = (2-x)
y = (3-x)

x -(3-x) +(2-x) = 1

x - 3 + x + 2 - x = 1

x - 1 = 1

x = 2
z = 0
y = 1