Answer:
X + 2y + -2y + -3z = 11 + -2y
2y + -2y = 0
X + 0 + -3z = 11 + -2y
X + -3z = 11 + -2y
X + -3z + 3z = 11 + -2y + 3z
-3z + 3z = 0
X + 0 = 11 + -2y + 3z
X = 11 + -2y + 3z
2)2x + -1y + y + 2z = 9 + y
-1y + y = 0
2x + 0 + 2z = 9 + y
2x + 2z = 9 + y
2x + 2z + -2z = 9 + y + -2z
2z + -2z = 0
2x + 0 = 9 + y + -2z
2x = 9 + y + -2z
x = 4.5 + 0.5y + -1z
3)[tex]4x+3y+z-\left(3y+z\right)=16-\left(3y+z\right)\\4x=16-3y-z\\\frac{4x}{4}=\frac{16}{4}-\frac{3y}{4}-\frac{z}{4}\\= \frax{16-3y-zc}{4}[/tex]
