Datrys 250*42*20=m*21*20+(m-50)*336

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

Datrys ar gyfer m

$$m=300$$

Camau ar gyfer Datrys Hafaliad Llinol

Lluosi 250 a 42 i gael 10500.

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

Lluosi 10500 a 20 i gael 210000.

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

Lluosi 21 a 20 i gael 420.

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

Defnyddio’r briodwedd ddosbarthu i luosi m-50 â 336.

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

Cyfuno m\times 420 a 336m i gael 756m.

$$210000=756m-16800$$

Cyfnewidiwch yr ochrau fel bod yr holl dermau newidiol ar yr ochr chwith.

$$756m-16800=210000$$

Ychwanegu 16800 at y ddwy ochr.

$$756m=210000+16800$$

Adio 210000 a 16800 i gael 226800.

$$756m=226800$$

Rhannu’r ddwy ochr â 756.

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

Rhannu 226800 â 756 i gael 300.

$$m=300$$