|x+21|=2

Lösung

∣ x + 21 ∣ = 2

x = - 23 or x = - 19

Schritte zur Lösung

∣ x + 21 ∣ = 2

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

x + 21 = - 2 or x + 21 = 2

x + 21 = - 2 or x + 21 = 2

x = - 23 or x = - 19

2 - 2 ∣ 2 x - 1 ∣ = - 4

∣ 7 r + 4 ∣ = 44

∣ x - 1 ∣ = - (x - 1)

2 \frac{1}{5} x - 2 = 8

3 ∣ 2 x - 7 ∣ = 21