Answer:
Step-by-step explanation:
7 x > 4 x + 100
7 x - 4 x > 100
3 x > 100
x > 100 : 3
x > 33.33
<u><em>Answer: they have to sell 34 pizzas to make a profit. </em></u>
3(7-22x) = 21-66x
42