Ax + By = C
A1x + B1y = C1
hpt(){
D=$(echo "scale=3; $1 * $5 - $2 * $4" | bc)
Dx=$(echo "scale=3; $3 * $5 - $2 * $6" | bc)
Dy=$(echo "scale=3; $1 * $6 - $3 * $4" | bc)
if [ $D -ne 0 ];then
x1=$(echo "scale=3; $Dx/$D" | bc)
x2=$(echo "scale=3; $Dy/$D" | bc)
echo "Phuong trinh co nghiem duy nhat: x = ($x1,$x2)."
elif [ $D -eq 0 ] && [ $Dx -eq 0 ] && [ $Dy -eq 0 ];then
echo "Phuong trinh vo so nghiem"
else
echo "Phuong trinh vo nghiem"
fi
}
hpt $1 $2 $3 $4 $5 $6


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