2|x-9|=20

Lösung

2 ∣ x - 9 ∣ = 20

x = - 1 or x = 19

Schritte zur Lösung

2 ∣ x - 9 ∣ = 20

Teile beide Seiten durch

2

∣ x - 9 ∣ = 10

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

x - 9 = - 10 or x - 9 = 10

x - 9 = - 10 or x - 9 = 10

x = - 1 or x = 19

∣ 3 x - 5 ∣ = 4 + 2 x

∣ x ∣ - 6 = 1

\frac{∣ x ∣}{5} - 3 = 4

8 ∣ 4 + 3 x ∣ - 1 = 31

∣ 3 x + 4 ∣ = 7