|7x-3|=39

解

∣ 7 x - 3 ∣ = 39

x = - \frac{36}{7} or x = 6

十進法表記

x = - 5.14285 \dots, x = 6

解答ステップ

∣ 7 x - 3 ∣ = 39

絶対規則を適用する:

∣ u ∣ = a, a > 0

の場合は

u = a

u = - a

7 x - 3 = - 39 or 7 x - 3 = 39

7 x - 3 = - 39 or 7 x - 3 = 39

x = - \frac{36}{7} or x = 6