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+//CHAPTER 1- D.C. CIRCUIT ANALYSIS AND NETWORK THEOREMS 
+//Example 16
+
+disp("CHAPTER 1");
+disp("EXAMPLE 16");
+
+//VARIABLE INITIALIZATION
+v=7;                            //voltage source in Volts
+I=7;                            //current source in Amperes
+r1=1;                           //in Ohms
+r2=2;                           //in Ohms
+r3=1;                           //in Ohms
+r4=2;                           //in Ohms
+r5=3;                           //in Ohms
+
+//SOLUTION
+//(4)vb+(-1)vc=0........eq (1)
+//(-2)vb+(11)vc=21......eq (2)
+//solving the equations by matrix method
+A=[4 -1;-2 11];
+b=[0;21];
+x=inv(A)*b;
+vb=x(1,:);                      //to access the 1st element of 2X1 matrix
+vc=x(2,:);                      //to access the 2nd element of 2X1 matrix
+vx=-vc;
+disp(sprintf("By Nodal analysis, the value of V_x is %d V",vx));
+
+//END