【1000問 – 連立方程式 – 問題集】小数点版

印刷する時は、A4用紙の縦方向で印刷してください。回答はこちらのページです。

$$\begin{eqnarray}\\ &(1)& \begin{cases}& – &1.1x& – &0.2y &=& – &2.2 \\ & – &1.8x& – &4.1y &=& &4.7 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(2)& \begin{cases}& – &0.6x& + &0.4y &=& – &2.3 \\ & &4.0x& + &2.0y &=& – &1.0 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$
$$\begin{eqnarray}\\ &(3)& \begin{cases}& &3.6x& – &0.8y &=& &4.0 \\ & – &1.1x& – &0.2y &=& – &3.4 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(4)& \begin{cases}& &1.3x& – &1.8y &=& &0.7 \\ & &0.8x& + &0.4y &=& &4.2 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$
$$\begin{eqnarray}\\ &(5)& \begin{cases}& &0.9x& + &2.6y &=& – &0.8 \\ & – &4.9x& – &5.0y &=& – &4.8 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(6)& \begin{cases}& – &1.0x& – &0.2y &=& &3.6 \\ & &3.0x& + &2.7y &=& &1.8 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$
$$\begin{eqnarray}\\ &(7)& \begin{cases}& – &4.7x& – &2.8y &=& – &0.2 \\ & – &5.0x& + &2.5y &=& – &3.5 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(8)& \begin{cases}& – &3.3x& – &3.6y &=& &1.2 \\ & – &3.4x& + &3.7y &=& &4.2 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$
$$\begin{eqnarray}\\ &(9)& \begin{cases}& – &0.6x& + &1.1y &=& – &3.6 \\ & &2.4x& – &0.4y &=& – &2.4 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(10)& \begin{cases}& – &0.5x& + &1.3y &=& – &0.6 \\ & &0.5x& – &0.3y &=& – &4.4 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$