Use the gaussian elimination method with back substitution to follow to solve the given system of linear equation. x+2y=3 and 2x-y=-4

Question

Use the gaussian elimination method with back substitution to follow to solve the given system of linear equation. x+2y=3 and 2x-y=-4

Answer 1

|1 2| 3|

|2 -1| -4|

do row operations until you get a diagonal matrix with all ones, and zeros off the diagonal

=

|1 0| -1|

|0 1| 2|

(x,y) = (-1, 2)

-1+2(2) =3

2(-1)-2 =-4

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