Datrys ar gyfer z
z=\frac{5}{19}\approx 0.263157895
Rhannu
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\frac{1}{5}z-8=4z+1-10
Rhannu 20 â 2 i gael 10.
\frac{1}{5}z-8=4z-9
Tynnu 10 o 1 i gael -9.
\frac{1}{5}z-8-4z=-9
Tynnu 4z o'r ddwy ochr.
-\frac{19}{5}z-8=-9
Cyfuno \frac{1}{5}z a -4z i gael -\frac{19}{5}z.
-\frac{19}{5}z=-9+8
Ychwanegu 8 at y ddwy ochr.
-\frac{19}{5}z=-1
Adio -9 a 8 i gael -1.
z=-\left(-\frac{5}{19}\right)
Lluoswch y ddwy ochr â -\frac{5}{19}, cilyddol -\frac{19}{5}.
z=\frac{5}{19}
Lluosi -1 a -\frac{5}{19} i gael \frac{5}{19}.
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