Given ,
`-2x + 6y = -22, x + 2y = -9`
A = `[[-2, 6], [1, 2]]`
and B = `[[-22], [-9]]`
so the augmented matrix is
[A B]= `[[-2, 6, -22], [1, 2, -9]]`
step 1. Divide row 1 by -2
`[[1, -3, 11], [1, 2, -9]]`
Step 2: Subtract row 1 from row 2
`[[1, -3, 11], [0, 5, -20]]`
Step 3: Divide row 2 by 5
`[[1, -3, 11], [0, 1, -4]]`
Step 4: Subtract (-3 × row 2) from row 1
`[[1, 0, -1], [0, 1, 4]]`
so the
values of x , y are x= -1 y = -4
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