#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#int main()
{
    float x,a,b;

    printf("Entrez a\n");
    scanf("%f",&a);
    printf("Entrez b\n");
    scanf("%f",&b);
    if(a==0){
        if(b ==0){
            printf("Equation indeterminee\n");
        }
        else{
            printf("Equation impossible\n");
        }
    }
    else{
        x = -b/a;
        printf("X vaut :%.3f\n",x);
    }

    return 0;
}