Whakaoti i te 250*42*20=m*21*20+(m-50)*336

$$250 \times 42 \times 20 = m \times 21 \times 20 + ( m - 50 ) \times 336$$

Whakaoti mō m

$$m=300$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakareatia te 250 ki te 42, ka 10500.

$$10500\times 20=m\times 21\times 20+\left(m-50\right)\times 336$$

Whakareatia te 10500 ki te 20, ka 210000.

$$210000=m\times 21\times 20+\left(m-50\right)\times 336$$

Whakareatia te 21 ki te 20, ka 420.

$$210000=m\times 420+\left(m-50\right)\times 336$$

Whakamahia te āhuatanga tohatoha hei whakarea te m-50 ki te 336.

$$210000=m\times 420+336m-16800$$

Pahekotia te m\times 420 me 336m, ka 756m.

$$210000=756m-16800$$

Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.

$$756m-16800=210000$$

Me tāpiri te 16800 ki ngā taha e rua.

$$756m=210000+16800$$

Tāpirihia te 210000 ki te 16800, ka 226800.

$$756m=226800$$

Whakawehea ngā taha e rua ki te 756.

$$m=\frac{226800}{756}$$

Whakawehea te 226800 ki te 756, kia riro ko 300.

$$m=300$$