Answer:
100-7x
Explanation:
given data
amount for sandwiches=$50
amount for drinks is $25
amount for gift bags=$25
total amount=$100
the number of persons be x
cost of sandwiches= 2.5x
cost of drinks= 1.5x
cost of bags =3x
therefore the total cost is
2.5+1.5+3=$7
the balance is
total amount -total cost
Balance=100-7x