20 books per box and x number of boxes.
To write an equation you have to figure out what variable you are solving for, which is x. Then you see what x is, which is the number of boxes. Finally you figure out what it takes from the given no. to get to the answer, x.
y = no. of books
x = y/20
Answer:
0.8229
Step-by-step explanation:
You measure your height and the height of your shadow the you measure the height of the poles shadow and you then have the equation
y(your height)/s(your shadows height)=x(flagpoles height)/z(flagpoles shadow)
then to find the answer you just multiply the z by y/s