A plane has 646 total seats,
which are
divided into
economy class
and business
class. For every
12 seats in
economy class,
there are 5 seats
in business
class. How
many seats are
there in
economy class?

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.