7. Solve the following simultaneous equations(3 marks each)using Crame – InterviewSolution

InterviewSolution

1.	7. Solve the following simultaneous equations(3 marks each)using Cramer's rule :(i) x + 18 = 2y; y = 2x - 9Solution :
Answer» x+18=2y= x-2y+18=0; 2x-y-9=0; 2(x-2y+18)=2x-4y+36; 2x-y-9=0/3y=27; y=27/3=9; x-2(9)+18; x=0;

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