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29 September, 11:42

Use Cramer's rule to solve the following system of equations.

5x + 3y = 7

4x + 5y = 3

A. x = 2, y = - 1

B. x = 4, y = 1

C. x = - - 2, y = - 1

D. x = 2, y = 5

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  1. 29 September, 11:59
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    5x + 3y = 7> (4) 5x + (4) 3y = (4) 7 4x + 5y = 3> (-5) 4x + (-5) 5y = (-5) 3 20y + 12y = 28 - 20x - 25y = - 15 (X's cross out) 12y - 25y = 28 - 15 - 13y = 13 Y = - 1 (Plug in for y) 5x + 3 (-1) = 7 5x - 3 = 7 (add 3 to 7) 5x = 10 (divide by 5) X = 2 Ordered Pair = (2, - 1)
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Home » Mathematics » Use Cramer's rule to solve the following system of equations. 5x + 3y = 7 4x + 5y = 3 A. x = 2, y = - 1 B. x = 4, y = 1 C. x = - - 2, y = - 1 D. x = 2, y = 5
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