/* solving two simultaneous equations General equation: a1 x + b1 y = c1 a2 x + b2 y = c2 description: This program obtain two equations with two unknowns (represented as x and y) from user and compute the values of the two unknowns to fulfill both equations. The method used here is Cramer's rule. resource: http://www.sanfoundry.com/java-program-solve-linear-equation/ other methods to solve a system of linear equations: - Gaussian elimination - Substitution - Solving by addition, subtraction or multiplication - Solving by using inverse matrix - Testing the equation with different sets of x and y valus / By guessing (Not recommended, use for loop or while loop if you insist to do so) */ #include using namespace std; int main() { double a1,a2,b1,b2,c1,c2,det,detx,dety,x,y; a1=2.0; a2=1.0; b1=3.0; b2=4.0; c1=9.0; c2=2.0; // equations: // a1 x + b1 y = c1 // a2 x + b2 y = c2 cout<<"Enter a1: "; cout<>a1; cout<<"Enter b1: "; cout<>b1; cout<<"Enter c1: "; cout<>c1; cout<<"Enter a2: "; cout<>a2; cout<<"Enter b2: "; cout<>b2; cout<<"Enter c2: "; cout<>c2; cout<<"\nThe equations are\n"; // print first equation if(a1==0) ; else if (a1==1) cout<<"x"; else if(a1==-1) cout<<"-x"; else cout<