Answer :
1)
y=cost of a birthday party
x=number of people.
y=4x+200
if y=324; then
324=4x+200
4x=324-200
4x=124
x=124/4
x=31
There are 31 people at the party
y=cost of a birthday party
x=number of people.
y=4x+200
if y=324; then
324=4x+200
4x=324-200
4x=124
x=124/4
x=31
There are 31 people at the party