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+//CHAPTER 1- D.C. CIRCUIT ANALYSIS AND NETWORK THEOREMS 
+//Example 25
+
+disp("CHAPTER 1");
+disp("EXAMPLE 25");
+
+//SOLUTION
+//(1)I1+(0)I2+(0)I3=5.............eq (1)
+//(-20)I1+(50)I2+(-20)I3=0........eq (2)
+//(0)I1+(1)I2+(-1)I3=5............eq (3)
+//solving the equations by matrix mehod
+A=[1 0 0;-20 50 -20;0 1 -1];
+b=[5;0;5];
+x=inv(A)*b;
+I1=x(1,:);                         //to access the 1st element of 3X1 matrix
+I2=x(2,:);                         //to access the 2nd element of 3X1 matrix
+I3=x(3,:);                         //to access the 3rd element of 3X1 matrix
+I=I2;
+disp(sprintf("By Mesh analysis, the value of I is %d A",I));
+
+//END 
+