Respostas

  • Usuário do Brainly
2014-06-01T22:57:49-03:00


n° de alunos =x


12 +1x/5 + 1x/2 = x

mmc=10

120 +2x +5x = 10x

3x = 120

x= 120/3

x=40            Total de alunos 40

2014-06-01T23:22:09-03:00
12+1x/5+1x/2=x
120+2x+5x = 10x
120 = 10x - 7x
120 = 3x
x = 120/3
x = 40 alunos