X * ( 5/ 6+ 1/6 ) =425
X * 1 =425
X = 425/1
X=425
X * ( 1/2 + 1/3 + 1/6 ) = 425
X * 1 = 425
X = 425 : 1
X = 425
X * ( 1/2 + 1/3 + 1/6 ) = 425
X x 1 = 425
X = 425 : 1
X = 425
x * (1/2 + 1/3 + 1/6) = 425
x * 1 = 425
x = 425 : 1
x = 425
X * ( \(\frac{1}{2}\)+ \(\frac{1}{3}\) + \(\frac{1}{6}\)) = 425
X * ( \(\frac{3}{6}\) + \(\frac{2}{6}\)+ \(\frac{1}{6}\)) = 425
X * ( \(\frac{5}{6}\) + \(\frac{1}{6}\) ) = 425
X * 1 = 425
X = 425 : 1
X = 425
X x ( 1/2 + 1/3 + 1/6 ) = 425
X x 1 = 425
=> X = 425 : 1
=> X = 425
Vậy X = 425
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