Datrys ar gyfer x
x=-\frac{90119406927624555031249840}{8365427}\approx -1.077284004 \cdot 10^{19}
Graff
Rhannu
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20000=10000\times 1126492586595306937890625+x\times 1015^{3}
Cyfrifo 1015 i bŵer 8 a chael 1126492586595306937890625.
20000=11264925865953069378906250000+x\times 1015^{3}
Lluosi 10000 a 1126492586595306937890625 i gael 11264925865953069378906250000.
20000=11264925865953069378906250000+x\times 1045678375
Cyfrifo 1015 i bŵer 3 a chael 1045678375.
11264925865953069378906250000+x\times 1045678375=20000
Cyfnewidiwch yr ochrau fel bod yr holl dermau newidiol ar yr ochr chwith.
x\times 1045678375=20000-11264925865953069378906250000
Tynnu 11264925865953069378906250000 o'r ddwy ochr.
x\times 1045678375=-11264925865953069378906230000
Tynnu 11264925865953069378906250000 o 20000 i gael -11264925865953069378906230000.
x=\frac{-11264925865953069378906230000}{1045678375}
Rhannu’r ddwy ochr â 1045678375.
x=-\frac{90119406927624555031249840}{8365427}
Lleihau'r ffracsiwn \frac{-11264925865953069378906230000}{1045678375} i'r graddau lleiaf posib drwy dynnu a chanslo allan 125.
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