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Question

3x + ay = 4
2x + ay = 2, a ≠ 0

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Solution

Given: 3x+ay = 4 2x+ay= 2 Using Cramer's rule, we get D =3 a2 a=3a-2a=aD1 =4 a2 a =4a-2a =2aD2=3 4 2 2 =6-8=-2Now,x=D1 D=2aa=2y=D2D=-2a=-2a x=2 and y=-2a

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