Datrys ar gyfer x
x=40000
Graff
Rhannu
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\frac{16000}{\frac{1}{100000}\times 2}=10^{4}\times 2x
Cyfrifo 10 i bŵer -5 a chael \frac{1}{100000}.
\frac{16000}{\frac{1}{50000}}=10^{4}\times 2x
Lluosi \frac{1}{100000} a 2 i gael \frac{1}{50000}.
16000\times 50000=10^{4}\times 2x
Rhannwch 16000 â \frac{1}{50000} drwy luosi 16000 â chilydd \frac{1}{50000}.
800000000=10^{4}\times 2x
Lluosi 16000 a 50000 i gael 800000000.
800000000=10000\times 2x
Cyfrifo 10 i bŵer 4 a chael 10000.
800000000=20000x
Lluosi 10000 a 2 i gael 20000.
20000x=800000000
Cyfnewidiwch yr ochrau fel bod yr holl dermau newidiol ar yr ochr chwith.
x=\frac{800000000}{20000}
Rhannu’r ddwy ochr â 20000.
x=40000
Rhannu 800000000 â 20000 i gael 40000.
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