【1000問 – 連立方程式 – 問題集】通常版

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$$\begin{eqnarray}\\ &(1)& \begin{cases}& – &14x& + &15y &=& &22 \\ & &23x& – &19y &=& &9 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(2)& \begin{cases}& &5x& + &9y &=& – &17 \\ & &1x& + &13y &=& &19 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$
$$\begin{eqnarray}\\ &(3)& \begin{cases}& – &10x& + &12y &=& &4 \\ & &3x& – &5y &=& &24 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(4)& \begin{cases}& – &2x& + &16y &=& – &16 \\ & &10x& – &27y &=& – &26 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$
$$\begin{eqnarray}\\ &(5)& \begin{cases}& &12x& – &13y &=& &2 \\ & &20x& – &23y &=& &6 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(6)& \begin{cases}& &9x& – &30y &=& – &24 \\ & &4x& – &14y &=& – &10 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$
$$\begin{eqnarray}\\ &(7)& \begin{cases}& &20x& – &22y &=& &6 \\ & – &3x& + &2y &=& – &23 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(8)& \begin{cases}& – &25x& – &26y &=& – &22 \\ & &13x& + &21y &=& – &11 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$
$$\begin{eqnarray}\\ &(9)& \begin{cases}& &2x& – &6y &=& – &2 \\ & – &9x& + &28y &=& &11 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$$$\begin{eqnarray}\\ &(10)& \begin{cases}& – &13x& – &29y &=& &16 \\ & – &24x& – &4y &=& – &20 \end{cases}\\[ 40pt ] & & \underline{ \hspace{ 30pt } x = \hspace{ 40pt } y = \hspace{ 40pt } }\\[ 10pt ]\end{eqnarray}$$