-3|7x|=-42

Lösung

- 3 ∣ 7 x ∣ = - 42

x = - 2 or x = 2

Schritte zur Lösung

- 3 ∣ 7 x ∣ = - 42

Teile beide Seiten durch

- 3

∣ 7 x ∣ = 14

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

7 x = - 14 or 7 x = 14

7 x = - 14 or 7 x = 14

x = - 2 or x = 2

- 5 ∣ u ∣ = - 17

∣ x ∣ - 2 = 21

∣ 2 - x ∣ + 2 = 0

4 ∣ s ∣ = 0

∣ 5 x - 15 ∣ = 20