Toán Lớp 9: Giải hệ ạ `{(0text{,}5a+3b=0text{,}6),(b+c=0text{,}3),(4d-a=0text{,}6),(122text{,}5a+207b+111c+74text{,}5d=82text{,}3):}` -

Toán Lớp 9: Giải hệ ạ
{(0\text{,}5a+3b=0\text{,}6),(b+c=0\text{,}3),(4d-a=0\text{,}6),(122\text{,}5a+207b+111c+74\text{,}5d=82\text{,}3):}

Toán Lớp 9: Giải hệ ạ `{(0\text{,}5a+3b=0\text{,}6),(b+c=0\text{,}3),(4d-a=0\text{,}6),(122\text{,}5a+207b+111c+74\text{,}5d=82\text{,}3):}`