|4x-7|=21

Lösung

∣ 4 x - 7 ∣ = 21

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

Dezimale

x = - 3.5, x = 7

Schritte zur Lösung

∣ 4 x - 7 ∣ = 21

Wende Absoluteregel an: Wenn

∣ u ∣ = a, a > 0

dann

u = a

u = - a

4 x - 7 = - 21 or 4 x - 7 = 21

4 x - 7 = - 21 or 4 x - 7 = 21

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

x^{2} - 6 x - 3 = 0

s im pl i f y \frac{2 ( \frac{4}{3} )}{1 - ( \frac{4}{3} ) ^{2}}

s im pl i f y \frac{1}{3} + 4

x^{2} + 484 = 0

s im pl i f y 2. 8^{2}