A phone company offers two monthly plans. Plan A costs $9 plus an additional $0.18 for each minute of calls. Plan B costs $24 plus an additional $0.14 for ea
minute of calls
For what amount of calling do the two plans cost the
same?

Respuesta :

9 + .18x = 24 + .14x
.04x = 15
x = 375

The plans cost the same when you use 375 minutes of calling.