Consider the three systems of linear equations: 4x1 + 6x2 + 2x3 + 8x4 6x1 + 9x2 + 16x4 2x1 + 3x2 - 2x3 + 7x4 Select one: a. b. c. d. (A) e. none of the others (B) and (C) are equivalent (A) and (C) are equivalent (A) and (B) are equivalent (A), (B) and (C) are equivalent = = = 2 4 2 4x1 + 6x2 + 2x3 + 8x4 (B) 2x1 + 3x2 + 4x3 + x4 2x1 + 3x22x3 +7x4 = 2 || || || = 0 = 2 (C) 2x1 + 3x2 + x3 + 4x4 3x3 - 3x4 -3x3 + 3x4 = = 1 7- = 1

1. Solve the system of linear equations 3x + 2y 2 6x + 4y b 2-2 +4² y-1 3 C X- X1 - 3y 2x2 3x1 + 2x2 - - TE 14 2 20 + 5x3 = X3 2

Consider the three systems of linear equations: 4x₁ + 6x2 + 2x3 + 8x4 6x₁ + 9x2 + 16x4 2x1 + 3x2 - 2x3 + 7x4 Select one: O a. none of the others b. (A) O c. (A) and (B) are equivalent (A) and (C) are equivalent d. (B) and (C) are equivalent e. (A), (B) and (C) are equivalent = 2 4 2 = = 4x₁ + 6x2 + 2x3 + 8x4 (B) 2x₁ + 3x2 + 4x3 + x4 2x1 + 3x2 - 2x3 + 7x4 2 = 0 2 = || || = (C) 2x1 + 3x2 + x3 + 4x4 3x3 - 3x4 -3x3 + 3x4 = = = 1 -1 1

Consider the three systems of linear equations: 4x1 + 6x2 + 2x3 + 8x4 6x1 + 9x2 + 16x4 2x1 + 3x22x3 +7x4 (A) Select one: O a. (B) and (C) are equivalent O b. (A) and (C) are equivalent Oc. (A), (B) and (C) are equivalent O d. (A) and (B) are equivalent none of the others e. = 2 4 = 2 = 4x1 + 6x2 + 2x3 + 8x4 (B) 2x1 + 3x2 + 4x3 + x4 2x1 + 3x22x3 + 7x4 = = = 202 0 (C) 2x1 + 3x2 + x3 + 4x4 3x3 - 3x4 -3x3 + 3x4 = = -1