Question

Use matrices, if possible, to solve the following systems of linear equations by:
(i) the matrix inversion method (ii) the Cramer's rule.
(i) 2x - 21 = 4
(11) 2x + y =3
3x + 2y = 6
6x + 5y = 1
(iii) 4x + 2y = 8 0
(iv) 3x – 2y = -6
3- y=-1 which !
5x - 2y =-10
v) 3x – 2y4
(vi) 4x + y = 9
- 6x + 4y = 7
-3x - y=-5
(vii) 2x - 2y = 4
(viii) 3x - 4y = 4
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Answer 1

Answer:

sry...hv no idea

........

Answer 2

Answer:

2x-21=4

2x=21+4

2x =25

x=25/2

x=12.5 answer