Answer:
12
Step-by-step explanation:
substitute
4(4-1)
4(3)
12
<h2>
Answer:</h2>

The solution for x in this equation is <em>18</em>.<em> </em>
The length is 120 feet. Setting up a proportion, you get 1/40=3/x. Solving for x, you get 120.
The only thing you can do here is to try to simplify, so I'll assume that's what you want to do.

The numerator is a difference of squares, so it's easy to factorize:

In the denominator, we factorize by grouping:

So we have

U just move the decimal over and they would equal 3 and 0.1