Whakaoti i te {l}{1*7y=64}{2x+y=87}

$$\left. \begin{array} { l } { 1 \times 7 y = 64 } \\ { 2 x + y = 87 } \end{array} \right.$$

Whakaoti mō y, x

$$x = \frac{545}{14} = 38\frac{13}{14} \approx 38.928571429$$

$$y = \frac{64}{7} = 9\frac{1}{7} \approx 9.142857143$$

Ngā Upane Otinga

Whakaarohia te whārite tuatahi. Whakareatia te 1 ki te 7, ka 7.

$$7y=64$$

Whakawehea ngā taha e rua ki te 7.

$$y=\frac{64}{7}$$

Whakaarohia te whārite tuarua. Me kōkuhu ngā uara tāupe mōhiotia ki te whārite.

$$2x+\frac{64}{7}=87$$

Tangohia te \frac{64}{7} mai i ngā taha e rua.

$$2x=87-\frac{64}{7}$$

Tangohia te \frac{64}{7} i te 87, ka \frac{545}{7}.

$$2x=\frac{545}{7}$$

Whakawehea ngā taha e rua ki te 2.

$$x=\frac{\frac{545}{7}}{2}$$

Tuhia te \frac{\frac{545}{7}}{2} hei hautanga kotahi.

$$x=\frac{545}{7\times 2}$$

Whakareatia te 7 ki te 2, ka 14.

$$x=\frac{545}{14}$$

Kua oti te pūnaha te whakatau.

$$y=\frac{64}{7} x=\frac{545}{14}$$