Respuesta :

aledip

Answer:

Marcus invited 40 and Laticia invited 28  

Step-by-step explanation:

x+y=68          x+40=68  

x=y-12               -40 -40              

 y-12+y=68         x=28

2y-12=68  

 +12 +12

2y=80  

2    2

y=40