|-4a+9|=16

Lösung

∣ - 4 a + 9 ∣ = 16

a = - \frac{7}{4} or a = \frac{25}{4}

Dezimale

a = - 1.75, a = 6.25

Schritte zur Lösung

∣ - 4 a + 9 ∣ = 16

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

- 4 a + 9 = - 16 or - 4 a + 9 = 16

- 4 a + 9 = - 16 or - 4 a + 9 = 16

a = - \frac{7}{4} or a = \frac{25}{4}

3 ∣ x ∣ + 4 = 21

4 - 5 x = ∣ 5 x - 4 ∣

11 ∣ x - 8 ∣ - 7 = 48

∣ x ∣ = (x + 1)^{2} - 7

9 ∣ 7 - 3 x ∣ + 2 = 34