Respuesta :
assuming there was only 1 visit
V= visit = 80
S=rooms sprayed= 35
x=amount of rooms sprayed
(80)+x(35)=395
subtract 80 from both sides
x(35)=315
divide 35 from both sides
x=9
9 rooms were sprayed
V= visit = 80
S=rooms sprayed= 35
x=amount of rooms sprayed
(80)+x(35)=395
subtract 80 from both sides
x(35)=315
divide 35 from both sides
x=9
9 rooms were sprayed