Whakaoti i te 2/5+x*7/9=211/15

$$\frac { 2 } { 5 } + x \times \frac { 7 } { 9 } = 2 \frac { 11 } { 15 }$$

Whakaoti mō x

$$x=3$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Me whakarea ngā taha e rua o te whārite ki te 45, arā, te tauraro pātahi he tino iti rawa te kitea o 5,9,15.

$$18+45x\times \frac{7}{9}=3\left(2\times 15+11\right)$$

Tuhia te 45\times \frac{7}{9} hei hautanga kotahi.

$$18+\frac{45\times 7}{9}x=3\left(2\times 15+11\right)$$

Whakareatia te 45 ki te 7, ka 315.

$$18+\frac{315}{9}x=3\left(2\times 15+11\right)$$

Whakawehea te 315 ki te 9, kia riro ko 35.

$$18+35x=3\left(2\times 15+11\right)$$

Whakareatia te 2 ki te 15, ka 30.

$$18+35x=3\left(30+11\right)$$

Tāpirihia te 30 ki te 11, ka 41.

$$18+35x=3\times 41$$

Whakareatia te 3 ki te 41, ka 123.

$$18+35x=123$$

Tangohia te 18 mai i ngā taha e rua.

$$35x=123-18$$

Tangohia te 18 i te 123, ka 105.

$$35x=105$$

Whakawehea ngā taha e rua ki te 35.

$$x=\frac{105}{35}$$

Whakawehea te 105 ki te 35, kia riro ko 3.

$$x=3$$