Whakaoti i te {l}{4ax=21}{ay=21/2}{2a=21}

$$\left. \begin{array} { l } { 4 a x = 21 } \\ { a y = \frac { 21 } { 2 } } \\ { 2 a = 21 } \end{array} \right.$$

Whakaoti mō a, x, y

$$x=\frac{1}{2}=0.5$$

$$y=1$$

$$a = \frac{21}{2} = 10\frac{1}{2} = 10.5$$

Ngā Upane Otinga

Whakaarohia te whārite tuatoru. Whakawehea ngā taha e rua ki te 2.

$$a=\frac{21}{2}$$

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

$$4\times \frac{21}{2}x=21$$

Whakareatia te 4 ki te \frac{21}{2}, ka 42.

$$42x=21$$

Whakawehea ngā taha e rua ki te 42.

$$x=\frac{21}{42}$$

Whakahekea te hautanga \frac{21}{42} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 21.

$$x=\frac{1}{2}$$

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

$$\frac{21}{2}y=\frac{21}{2}$$

Me whakarea ngā taha e rua ki te \frac{2}{21}, te tau utu o \frac{21}{2}.

$$y=\frac{21}{2}\times \frac{2}{21}$$

Whakareatia te \frac{21}{2} ki te \frac{2}{21}, ka 1.

$$y=1$$

Kua oti te pūnaha te whakatau.

$$a=\frac{21}{2} x=\frac{1}{2} y=1$$