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Question

Number of solutions of the simultaneous equation
3x+4y+9z=6
2x+4y+6z=7
12x+24y+60z=48

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Solution

Consider the Augumented Matrix
3496246712246048

R3R312

349624671254

R23R22R1
R33R3R1

349604090266

R32R3R2
3496040900123

so,the rank of A= rank of AB=3
system has unique solution

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