|7a|=7

Lösung

∣ 7 a ∣ = 7

a = - 1 or a = 1

Schritte zur Lösung

∣ 7 a ∣ = 7

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

7 a = - 7 or 7 a = 7

7 a = - 7 or 7 a = 7

a = - 1 or a = 1

∣ - 8 x ∣ = - 24

∣ x ∣ - 12 = - 4

2 ∣ 4 x + 5 ∣ = 0

∣ - x ∣ = 9

∣ 2 y + 5 ∣ = 3 y