Respuesta :

I think it is number two because 19-18=1 but I might be wrong.
18(b+19)=18
(18)(b)+(18)(19)=18
18b+342=18
18b+342-342=18-342
18b=-324
18b/18=-324/18
b=-18
(I hope i wasn’t too late)
Ver imagen quj38smmkv