|3x+9|=12

Lösung

∣ 3 x + 9 ∣ = 12

x = - 7 or x = 1

Schritte zur Lösung

∣ 3 x + 9 ∣ = 12

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

3 x + 9 = - 12 or 3 x + 9 = 12

3 x + 9 = - 12 or 3 x + 9 = 12

x = - 7 or x = 1

3 = ∣ x ∣ + 1

∣ 7 x ∣ = 4 + x

∣ 2 x - 5 ∣ = - 8

∣ x ∣ + ∣ 2 x + 3 ∣ = 4

4 ∣ k + 1 ∣ = 16