Answer:
x=36
Divide the corresponding side (16) by 4/7
First of all, this shouldn't be in high school category.
Second, 20 divided by 2 is 10. Dividing is like subtraction. You would subtract 20 by 2, and you would find that after 10 times, you will get to zero.
Area of the rhombus:
A = d 1 · d 2 / 2
72 = 16 · d 2 / 2
72 = 8 · d 2
d 2 = 72 : 8
Answer: d 2 = 9 yd