Datrys ar gyfer x
x = -\frac{5}{4} = -1\frac{1}{4} = -1.25
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\frac{2}{5}x-7-\frac{6}{5}x=-6
Tynnu \frac{6}{5}x o'r ddwy ochr.
-\frac{4}{5}x-7=-6
Cyfuno \frac{2}{5}x a -\frac{6}{5}x i gael -\frac{4}{5}x.
-\frac{4}{5}x=-6+7
Ychwanegu 7 at y ddwy ochr.
-\frac{4}{5}x=1
Adio -6 a 7 i gael 1.
x=1\left(-\frac{5}{4}\right)
Lluoswch y ddwy ochr â -\frac{5}{4}, cilyddol -\frac{4}{5}.
x=-\frac{5}{4}
Lluosi 1 a -\frac{5}{4} i gael -\frac{5}{4}.
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