carloseduardo811904

Resposta:

14x+24=10x+2x+30

14x+24=12x+30

14x+24=12x+30

14x+24-24= 12x+30-24

14x=12x+6

14x=12x+6

14x-12x= 12x+6-12x

2x=6

2x/2= 6/2

X=3