The width of a rectangle is 1/4 its length. What is the length of the rectangle if it's perimeter is 80 cm?
We can make 2 equations and solve for the variables.
Lets make l = length and w = width.
You can plug in w = 1/4*l into the second equation, so it turns into \(2(1/4l)+2l=80\)
Solving for that equation, you get \(l=32\)
So your answer would be
|\(length = 32\)|