9|7z+5|=27

Lösung

9 ∣ 7 z + 5 ∣ = 27

z = - \frac{8}{7} or z = - \frac{2}{7}

Dezimale

z = - 1.14285 \dots, z = - 0.28571 \dots

Schritte zur Lösung

9 ∣ 7 z + 5 ∣ = 27

Teile beide Seiten durch

9

∣ 7 z + 5 ∣ = 3

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

7 z + 5 = - 3 or 7 z + 5 = 3

7 z + 5 = - 3 or 7 z + 5 = 3

z = - \frac{8}{7} or z = - \frac{2}{7}

∣ 18 x - 5 ∣ = 0

92 = ∣ r - 900 ∣ - 8

2 - 9 ∣ - 5 x - 10 ∣ = - 88

∣ 5 x + 10 ∣ = 5

- 2 ∣ - 9 x - 5 ∣ = - 8