Question

Rezolvati in Z ecuatia: a. -5x-12=3

Answer 1

-5x = 3 + 12
-5x = 15 ⇒ x = 15 supra -5 ⇒ x=-3

Answer 2

-5x-12=3
⇒-5x=12+3
⇒-5x=15
⇒x=15/[-5]
⇒x=-3∈Z⇒x∈Z;