Datrys (420*10^3*x)+(275*10^3*30)/(420*10^3)+(275*10^3)=0

$$\frac{ (420 \times { 10 }^{ 3 } \times x)+(275 \times { 10 }^{ 3 } \times 30) }{ (420 \times { 10 }^{ 3 } )+(275 \times { 10 }^{ 3 } ) } =0$$

Datrys ar gyfer x

$$x = -\frac{275}{14} = -19\frac{9}{14} \approx -19.642857143$$

Camau ar gyfer Datrys Hafaliad Llinol

Cyfrifo 10 i bŵer 3 a chael 1000.

$$\frac{420\times 1000x+275\times 10^{3}\times 30}{420\times 10^{3}+275\times 10^{3}}=0$$

Lluosi 420 a 1000 i gael 420000.

$$\frac{420000x+275\times 10^{3}\times 30}{420\times 10^{3}+275\times 10^{3}}=0$$

Cyfrifo 10 i bŵer 3 a chael 1000.

$$\frac{420000x+275\times 1000\times 30}{420\times 10^{3}+275\times 10^{3}}=0$$

Lluosi 275 a 1000 i gael 275000.

$$\frac{420000x+275000\times 30}{420\times 10^{3}+275\times 10^{3}}=0$$

Lluosi 275000 a 30 i gael 8250000.

$$\frac{420000x+8250000}{420\times 10^{3}+275\times 10^{3}}=0$$

Cyfrifo 10 i bŵer 3 a chael 1000.

$$\frac{420000x+8250000}{420\times 1000+275\times 10^{3}}=0$$

Lluosi 420 a 1000 i gael 420000.

$$\frac{420000x+8250000}{420000+275\times 10^{3}}=0$$

Cyfrifo 10 i bŵer 3 a chael 1000.

$$\frac{420000x+8250000}{420000+275\times 1000}=0$$

Lluosi 275 a 1000 i gael 275000.

$$\frac{420000x+8250000}{420000+275000}=0$$

Adio 420000 a 275000 i gael 695000.

$$\frac{420000x+8250000}{695000}=0$$

Rhannu pob term 420000x+8250000 â 695000 i gael \frac{84}{139}x+\frac{1650}{139}.

$$\frac{84}{139}x+\frac{1650}{139}=0$$

Tynnu \frac{1650}{139} o'r ddwy ochr. Mae tynnu unrhyw beth o sero’n rhoi negydd y swm.

$$\frac{84}{139}x=-\frac{1650}{139}$$

Lluoswch y ddwy ochr â \frac{139}{84}, cilyddol \frac{84}{139}.

$$x=-\frac{1650}{139}\times \frac{139}{84}$$

Lluoswch -\frac{1650}{139} â \frac{139}{84} drwy luosi'r rhifiadur â’r rhifiadur a'r enwadur â’r enwadur.

$$x=\frac{-1650\times 139}{139\times 84}$$

Canslo 139 yn y rhifiadur a'r enwadur.

$$x=\frac{-1650}{84}$$

Lleihau'r ffracsiwn \frac{-1650}{84} i'r graddau lleiaf posib drwy dynnu a chanslo allan 6.

$$x=-\frac{275}{14}$$