math111_logo System of Linear Equations


Exercise Which of the following are (systems of) linear equations?

1) x12 + x22 = 1

Answer No

2) x - y = y - z = z - x

Answer Yes

3) x1 + x2 = x3 + x4 + 1, x1 + x3 = x2 + x4 + 2, x1 + x4 = x2 + x3 + 3

Answer Yes

4) xy = 1

Answer No

5) u + v + w = 21/2, u2 + v2 + w2 = 32/3

Answer No