Respuesta :
10.99x = 3.99x + 280
7x = 280
x = 40
They must sell 40 T-shirts to break even
7x = 280
x = 40
They must sell 40 T-shirts to break even
Answer:
40 T-shirts
Step-by-step explanation:
10.99x = 3.99x + 280
7x = 280
x = 40