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+//CHAPTER 1- D.C. CIRCUIT ANALYSIS AND NETWORK THEOREMS 
+//Example 14
+
+disp("CHAPTER 1");
+disp("EXAMPLE 14");
+
+//VARIABLE INITIALIZATION
+v=10;                          //voltage source in Volts
+I3=-5;                         //current source in Amperes
+r1=2;                          //in Ohms
+r2=2;                          //in Ohms
+r3=4;                          //in Ohms
+
+//SOLUTION
+//by loop analysis
+//(1)I1+(-1)I2=0.........eq (1)
+//(4)I1+(-2)I2=10........eq (2)
+//solving the equations by matrix method
+A=[1 -1;4 -2]; 
+b=[0;10];
+x=inv(A)*b;
+I1=x(1,:);                     //to access 1st element of 2X1 matrix
+I2=x(2,:);                     //to access 2nd element of 2X1 matrix
+In=I2-I3;
+rn=(r1*r2)/(r1+r2);
+I=(rn*In)/(rn+r3); 
+disp(sprintf("By Norton Theorem, the current through resistor R3 is %d A",I));
+
+//END
+