The equations 5x-4y+8=0 , 7x+6y-9=0
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5x−4y+8=0⇒a1 =5,b1 =−4,c 1 =8
7x+6y−9=0⇒a2 =7,b2 =6,c2 =−9
∴ a 1/a 2 = 5/7
−4/6 = −2/3
c 1/c 2 = 8/-9
= a 1/a 2 is not equals to b1/b2
Therefore we have a unique solution.
Our system is consistent.
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