Question 745619
Your inequality is the amount of cheese on the pizzas is less than or equal to (<=) the total amount of cheese.  The number of pizzas is unknown, so call it p.  6 is the number of pizzas for one sample situation, not for the general situation.<P>
In general the number of pizzas, p, times the cheese per pizza, .75, = the total cheese used.  That must be less than or equal to 4.<P>
.75p <= 4<P>
p <= 4/.75 <= 5.33  You can make 5 and 1/3 pizzas with 4 pounds of cheese.  You don't have enough cheese for 6 pizzas.