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Posted: **Thu May 12, 2022 6:57 am**

: Problems Solve The Systems Of Linear Equations In Probs 1 40 Through 1 43 By A Substitution B Subtraction Or Addit 1 (42 KiB) Viewed 29 times

: Problems Solve The Systems Of Linear Equations In Probs 1 40 Through 1 43 By A Substitution B Subtraction Or Addit 2 (17.43 KiB) Viewed 29 times

: Problems Solve The Systems Of Linear Equations In Probs 1 40 Through 1 43 By A Substitution B Subtraction Or Addit 3 (41.96 KiB) Viewed 29 times

PROBLEMS Solve the systems of linear equations in Probs. 1.40 through 1:43 by (a) substitution, (b) subtraction or addition, and (c) determinants. 1.40 -15x + 2ly = 12 -2x + 3y = 17 1.41 19u - 20 = -22 20u - 21y = -23 1.42 5m - 3n = 9 3m - 5n = -9 1.43 2A + 2B = 3 + = A - B = -0.9 -

Solve the system of equations in Probs. 1.48 through 1.51 by Cramer's rule. Evaluate the determinants by minors or by expanding along the diagonals.

= 1.48 2x + 3y - 2z = -7 = x + y + z = 2 -x - 3y + 2z = 5 1.49 P + 3Q + 2R = 2 -2P - 2 + 3R = = 1 -P + Q + R= -1 1.50 yt 22 = 1 -2x + 2y - z = 3 3x – y + z = 2 1.51 2A + 3B + 2C = 3 2A + B - 4C= 4 A + 2B + C = 2