Shanghang Education Clothing Factory wants to produce a batch of student clothes of a certain model. It is known that 3.5-meter-long cloth can be used to make 3 coats or 4 pairs of trousers.
Set to x clothes coat and trousers.
{3.5x/3+3.5x/4≤ 10500
x≤5 142.86
3.5×5 142÷3=5999 (m)
3.5×5 142÷4=4499.25 (m)
A: Only jackets and trousers made of 5999m and 4499.25m fabrics can be matched. A total of 5 142 sets can be produced.