|7x+5|=9

Lösung

∣ 7 x + 5 ∣ = 9

x = - 2 or x = \frac{4}{7}

Dezimale

x = - 2, x = 0.57142 \dots

Schritte zur Lösung

∣ 7 x + 5 ∣ = 9

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

7 x + 5 = - 9 or 7 x + 5 = 9

7 x + 5 = - 9 or 7 x + 5 = 9

x = - 2 or x = \frac{4}{7}

- 13 = 3 ∣ x + 1 ∣ + 2

∣ - 5 x - 9 ∣ = 25

∣ x + 9 ∣ = 3

∣ x + 9 ∣ = 2

∣ x + 9 ∣ = 0