Datrys ar gyfer x
x = -\frac{63}{22} = -2\frac{19}{22} \approx -2.863636364
Graff
Rhannu
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\frac{2}{21}x=\frac{4}{9}x+1
Cyfuno \frac{3}{7}x a -\frac{1}{3}x i gael \frac{2}{21}x.
\frac{2}{21}x-\frac{4}{9}x=1
Tynnu \frac{4}{9}x o'r ddwy ochr.
-\frac{22}{63}x=1
Cyfuno \frac{2}{21}x a -\frac{4}{9}x i gael -\frac{22}{63}x.
x=1\left(-\frac{63}{22}\right)
Lluoswch y ddwy ochr â -\frac{63}{22}, cilyddol -\frac{22}{63}.
x=-\frac{63}{22}
Lluosi 1 a -\frac{63}{22} i gael -\frac{63}{22}.
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