(|237.4-x|)/(237.4)=0.09

解答

\frac{∣ 237.4 - x ∣}{237.4} = 0.09

x = 216.034 or x = 258.766

求解步骤

\frac{∣ 237.4 - x ∣}{237.4} = 0.09

在两边乘以

237.4

∣ 237.4 - x ∣ = 21.366

使用绝对值运算法则: 若

∣ u ∣ = a, a > 0

，则

u = a

u = - a

237.4 - x = - 21.366 or 237.4 - x = 21.366

237.4 - x = - 21.366 or 237.4 - x = 21.366

x = 216.034 or x = 258.766

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