|2x+3|=10

解

∣ 2 x + 3 ∣ = 10

x = - \frac{13}{2} or x = \frac{7}{2}

十進法表記

x = - 6.5, x = 3.5

解答ステップ

∣ 2 x + 3 ∣ = 10

絶対規則を適用する:

∣ u ∣ = a, a > 0

の場合は

u = a

u = - a

2 x + 3 = - 10 or 2 x + 3 = 10

2 x + 3 = - 10 or 2 x + 3 = 10

x = - \frac{13}{2} or x = \frac{7}{2}