Răspuns:
×=6
Explicație pas cu pas:
12× - 6 - 5x - 2= 12x - 5x - 6 -2= 7x - 6 - 2= 7x - 8
=> 7x - 8= 6x - 2 => x= 8 - 2= 6
12x-6-5x-2=6x-2
12x-6-5x=6x
7x-6=6x
7x-6x=6
S:{6}
