Calculate Linear equation using Java

// linear equation program

import java.io.*;
class ssvli
{
public static void main(String arg[])
{
float x1,x2,a,b,c,d,m,n,z;
a=2;b=3;c=4;d=5;m=6;n=8;
System.out.println("1st linear equation is=>  "+a + "x1 +" + b +"x2=" +m);
System.out.println("2ed linear equation is=>  "+c + "x1 +" + d +"x2=" +n);
System.out.println("using formula and we get the val of x1 & x2 as:");
z=(a*d)-(c*b);
if(z==0)
{
System.out.println("************the denominator (a*d)-(c*b) is not equal to zero");
}
else
{
x1=(m*d-b*n)/(a*d-c*b);
x2=(n*a-m*c)/(a*d-c*b);
System.out.println("           x1="+x1);
System.out.println("           x2="+x2);
}
}

}