Answer:
which is the required expression.
Explanation:
We have been given the area of parallelogram which is (4x+16)
And the formula for area of parallelogram is

Hence, when we substitute the value if area of parallelogram in the formula we get:

Now, rearranging the terms so, as to get the expression for the base or value of base in terms of height and area we get:
which is the required expression.