Datrys ar gyfer x
x = \frac{71}{2} = 35\frac{1}{2} = 35.5
Graff
Rhannu
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2x=75-4
Tynnu 4 o'r ddwy ochr.
2x=71
Tynnu 4 o 75 i gael 71.
x=\frac{71}{2}
Rhannu’r ddwy ochr â 2.
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