Question

Ajutor!!!!

Rezolvati in Z 4x- x-1= 5(x-3)
2. 4

Answer 1

$4x-x-1=5(x-3), x\in\Bbb{Z}$
$3x-1=5x-15\implies 3x-1+15=5x\implies 3x+14=5x$
$14=2x\implies x=\frac{14}{2}=7$