Datrys ar gyfer y
y=\frac{15}{28}\approx 0.535714286
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6\left(3\times 2+3\right)-4\left(2\times 3+1\right)y=3\left(3\times 4+1\right)
Lluoswch ddwy ochr yr hafaliad wrth 12, lluoswm cyffredin lleiaf 2,3,4.
6\left(6+3\right)-4\left(2\times 3+1\right)y=3\left(3\times 4+1\right)
Lluosi 3 a 2 i gael 6.
6\times 9-4\left(2\times 3+1\right)y=3\left(3\times 4+1\right)
Adio 6 a 3 i gael 9.
54-4\left(2\times 3+1\right)y=3\left(3\times 4+1\right)
Lluosi 6 a 9 i gael 54.
54-4\left(6+1\right)y=3\left(3\times 4+1\right)
Lluosi 2 a 3 i gael 6.
54-4\times 7y=3\left(3\times 4+1\right)
Adio 6 a 1 i gael 7.
54-28y=3\left(3\times 4+1\right)
Lluosi 4 a 7 i gael 28.
54-28y=3\left(12+1\right)
Lluosi 3 a 4 i gael 12.
54-28y=3\times 13
Adio 12 a 1 i gael 13.
54-28y=39
Lluosi 3 a 13 i gael 39.
-28y=39-54
Tynnu 54 o'r ddwy ochr.
-28y=-15
Tynnu 54 o 39 i gael -15.
y=\frac{-15}{-28}
Rhannu’r ddwy ochr â -28.
y=\frac{15}{28}
Gellir symlhau’r ffracsiwn \frac{-15}{-28} i \frac{15}{28} drwy dynnu’r arwydd negatif o’r rhifiadur a’r enwadur.
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