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+//CHAPTER 1- D.C. CIRCUIT ANALYSIS AND NETWORK THEOREMS 
+//Example 11
+
+disp("CHAPTER 1");
+disp("EXAMPLE 11");
+
+//VARIABLE INITIALIZATION
+I3=-5;                              //in Amperes
+
+//SOLUTION
+
+//(4)I1+(-2)I2=10...........eq (1)
+//(-2)I1+(6)I2=-20..........eq (2)
+//solving the equations using matrix method
+
+A=[4 -2; -2 6]; 
+b=[10;-20];
+x=inv(A)*b;
+I1=x(1,:);                          //to access 1st element of 2X1 matrix
+I2=x(2,:);                          //to access 2nd element of 2X1 matrix
+I=I2-I3;
+disp(sprintf("By Mesh analysis, the current through resistor R3 is %d A",I));
+
+//END
+