Ethan writes the ratio x/10 = y/20 to help him reduce the size of a two-dimensional shape. If the new value of y is 7 units, what will be the value of x?

Answer 1

To find the value of x, we can set up a proportion by cross multiplying:

x/10 = 7/20

Cross multiplying gives us:

20x = 70
x = 70/20
x = 3.5

Therefore, the value of x will be 3.5 units.