snmassieh snmassieh 29-04-2020 Mathematics contestada How many solutions does the system have? \begin{cases} 3y =- 6x+9 \\\\ y =-6x+9 \end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ 3y=−6x+9 y=−6x+9