Chapter 2

x = 3 x = 3, y = 1, z = 2. 10. x + 2y = 3. y + z = 3. x + 3z = 2. x + 2y = 3 multiply second equation by 2. 2y + 2z = 6 subtract from first. x - 2z = -3. Use this equation with the third. x - 2z = -3. x + 3z = 2 subtract - 5z = -5. z = 1. x + 3(1) = 2. x = -1. y + 1 = 3. y = 2 (-1, 2, 1) 11. ................
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