-8+|-8r-5|=19

Lösung

- 8 + ∣ - 8 r - 5 ∣ = 19

r = - 4 or r = \frac{11}{4}

Dezimale

r = - 4, r = 2.75

Schritte zur Lösung

- 8 + ∣ - 8 r - 5 ∣ = 19

Verschiebe

8

auf die rechte Seite

∣ - 8 r - 5 ∣ = 27

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

- 8 r - 5 = - 27 or - 8 r - 5 = 27

- 8 r - 5 = - 27 or - 8 r - 5 = 27

r = - 4 or r = \frac{11}{4}

∣ b + 4 ∣ = 2

∣ 2 n ∣ = 0

∣ b + 4 ∣ = 7

so l v e f or x, ∣ 2 x - 9 ∣ = x

- 4 = ∣ r ∣ - 5