115 = x \left( 1+3. { 10 }^{ -3 } .50 \right)
Datrys ar gyfer x
x = \frac{230000}{2003} = 114\frac{1658}{2003} \approx 114.827758362
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115=x\left(1+3\times \frac{1}{1000}\times 0.5\right)
Cyfrifo 10 i bŵer -3 a chael \frac{1}{1000}.
115=x\left(1+\frac{3}{1000}\times 0.5\right)
Lluosi 3 a \frac{1}{1000} i gael \frac{3}{1000}.
115=x\left(1+\frac{3}{2000}\right)
Lluosi \frac{3}{1000} a 0.5 i gael \frac{3}{2000}.
115=x\times \frac{2003}{2000}
Adio 1 a \frac{3}{2000} i gael \frac{2003}{2000}.
x\times \frac{2003}{2000}=115
Cyfnewidiwch yr ochrau fel bod yr holl dermau newidiol ar yr ochr chwith.
x=115\times \frac{2000}{2003}
Lluoswch y ddwy ochr â \frac{2000}{2003}, cilyddol \frac{2003}{2000}.
x=\frac{230000}{2003}
Lluosi 115 a \frac{2000}{2003} i gael \frac{230000}{2003}.
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