Question 356732
42x>y+19
40x<y-8 subtract.
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2x=27
x=$13.5 cost per person.
Proof:
42*13.5>y+19
40*13.5<y-8 add.
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(42+40)13.5=2y+11
82*13.5=2y+11
1107=2y+11
2y=1107-11
2y=1096
y=1096/2
y=$548 cost of the party.
Proof:
42*13.5>548+19
567>567
540<548-8
540<540