Datrys -681000=left(2248-3441right)40000+x*3600-05*40000*(140^2-70^2)

$$-681000 = \left( 2248-3441 \right) 40000+x \times 3600-05 \times 40000 \times ( { 140 }^{ 2 } - { 70 }^{ 2 } )$$

Datrys ar gyfer x

$$x = \frac{235195}{18} = 13066\frac{7}{18} \approx 13066.388888889$$

Camau ar gyfer Datrys Hafaliad Llinol

Tynnu 3441 o 2248 i gael -1193.

$$-681000=-1193\times 40000+x\times 3600-0\times 5\times 40000\left(140^{2}-70^{2}\right)$$

Lluosi -1193 a 40000 i gael -47720000.

$$-681000=-47720000+x\times 3600-0\times 5\times 40000\left(140^{2}-70^{2}\right)$$

Lluosi 0 a 5 i gael 0.

$$-681000=-47720000+x\times 3600-0\times 40000\left(140^{2}-70^{2}\right)$$

Lluosi 0 a 40000 i gael 0.

$$-681000=-47720000+x\times 3600-0\left(140^{2}-70^{2}\right)$$

Cyfrifo 140 i bŵer 2 a chael 19600.

$$-681000=-47720000+x\times 3600-0\left(19600-70^{2}\right)$$

Cyfrifo 70 i bŵer 2 a chael 4900.

$$-681000=-47720000+x\times 3600-0\left(19600-4900\right)$$

Tynnu 4900 o 19600 i gael 14700.

$$-681000=-47720000+x\times 3600-0\times 14700$$

Lluosi 0 a 14700 i gael 0.

$$-681000=-47720000+x\times 3600-0$$

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

$$-47720000+x\times 3600-0=-681000$$

Ychwanegu 0 at y ddwy ochr.

$$-47720000+x\times 3600=-681000+0$$

Adio -681000 a 0 i gael -681000.

$$-47720000+x\times 3600=-681000$$

Ychwanegu 47720000 at y ddwy ochr.

$$x\times 3600=-681000+47720000$$

Adio -681000 a 47720000 i gael 47039000.

$$x\times 3600=47039000$$

Rhannu’r ddwy ochr â 3600.

$$x=\frac{47039000}{3600}$$

Lleihau'r ffracsiwn \frac{47039000}{3600} i'r graddau lleiaf posib drwy dynnu a chanslo allan 200.

$$x=\frac{235195}{18}$$