1. set up the equation which makes these shapes equal, 1/2(2(x+1)) = 1x
2. solve, x+1=x, 1=0
3. since this is impossible, there is no solution and zero answers
This will be your formula:

cross multiply (32 times x) (120 times 800)
this is what you'll get:
I think that the answer is 8
if you want to check if it is right input 8 in place of b
Answer:

Step-by-step explanation:
A parallelogram has opposite parallel sides and it is a quadrilateral.