Total product to be shipped at the end of 4th day = 4x + y

this product is divided into 7 trucks and it takes 4days.

So, $\frac{4x+y}{7} = 4$

Is this way of thinking is wrong?? (seems similar to yours)

this product is divided into 7 trucks and it takes 4days.

So, $\frac{4x+y}{7} = 4$

Is this way of thinking is wrong?? (seems similar to yours)