Datrys ar gyfer x
x=-\frac{120000}{29999999999}\approx -0.000004
Graff
Rhannu
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x=30000000000x+120000
Lluosi 100000 a 300000 i gael 30000000000.
x-30000000000x=120000
Tynnu 30000000000x o'r ddwy ochr.
-29999999999x=120000
Cyfuno x a -30000000000x i gael -29999999999x.
x=\frac{120000}{-29999999999}
Rhannu’r ddwy ochr â -29999999999.
x=-\frac{120000}{29999999999}
Gellir ailysgrifennu \frac{120000}{-29999999999} fel -\frac{120000}{29999999999} drwy echdynnu’r arwydd negatif.
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