Question

Solve the following system of equations by using the inverse of the coefficient matrix if it exists and by the echelon method

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Answer #1

The system of equations is

x+4y = -11

5x+2y = 17

In matrix notation, it is

52 -|| 一 14 2一4 一口 2-20 4 Hence 52 52 4 29 幻] - CH] [j] = F83][S >[3] = [FH]) X: + 1 22 -- 9:11 + H = 「2-18 478 - sig > -18 -Hhence answer is

A. the solution of the system is (5, -4)

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