Answer:
There are 55 large boxes
and 70 small boxes.
Explanation:
Let's assume that the number of large boxes is x, and the number of small boxes is y. We then can use how many pounds each box weighs to form a system of equations.
System:

Step 1: Solve for a variable
is also

Step 2: Substitute

Step 3: Simplify

Step 4: Solve for y
