Resposta :
x/2+x/3+x/5= 124 faz o mmc
(15x+10x +6x)/30=124
31x=124x30
31x=3720
x=3720/31
x=120
120/2+120/3+120/5 =124
(15x+10x +6x)/30=124
31x=124x30
31x=3720
x=3720/31
x=120
120/2+120/3+120/5 =124