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+//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex2_8.sce.
+
+clc;
+clear;
+R1=3;
+R2=4;
+R3=2;
+R4=1;
+
+a1=7;b1=-4;c1=2;                              //these are the coefficient values of I1,I2 and source obtained from the first loop in the given circuit 
+a2=-10;b2=7;c2=3;                             //these are the coefficient values of I1,I2 and source obtained from the second loop  in the given circuit 
+del=det([a1 b1;a2 b2]);
+del1=det([c1 b1;c2 b2]);
+del2=det([a1 c1;a2 c2]);
+
+I1=del1/del;                              //Using Cramer's rule
+I2=del2/del;                                //Using Cramer's rule
+I=I2-I1;
+printf("\n  Current through the 4 ohm resistor=%1.2f A(upward) \n",I)