Question 22986: solve the system of linear equations using the guass-jordan method.
x-2y=8
3x+4y=4
Answer by ks(2)   (Show Source):
You can put this solution on YOUR website! x-2y=8 ------------ (1)
3x+4y=4 ----------- (2)
Multiply equation (1) by 2
2x-4y=16 ---------(3)
3x+4y=4 ---------- (4)
Subtract equation (4) from (3)
-x=12
x=-12
Substitute x=-12 in(1)
-12-2y=8
-12-8=2y
2y=-20
y=-10
Hence , x=-12, y=-10
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