3、若线性方程组的增广矩阵为 $\left(\begin{array}{lll}2 & 3 & c_{1} \\ 0 & 1 & c_{2}\end{array}\right)$ 、解为 $\left\{\begin{array}{l}x=3 \\ y=5\end{array}\right.$ ，则 $c_{1}-c_{2}=$ $\_\_\_\_$ ．
参考答案16
2015 高考数学第 3 题答案解析
2015_上海卷 (2015·理)
2015_上海卷 (2015·理)
3、若线性方程组的增广矩阵为 $\left(\begin{array}{lll}2 & 3 & c_{1} \\ 0 & 1 & c_{2}\end{array}\right)$ 、解为 $\left\{\begin{array}{l}x=3 \\ y=5\end{array}\right.$ ，则 $c_{1}-c_{2}=$ $\_\_\_\_$ ．