4. Rezolvati in R ecuatia
5x - 1 = 3(5x 1/2
- 2)

Răspuns:
x=1/2
Explicație pas cu pas:
5x-1=3(5x-2) ⇒5x-1=15x-6 ⇒5x+5=15x ⇒10x=5 ⇒x=5/10 ⇒ x=1/2