We are told that l is the length of the rectangle. We are told that the widht is 4 less than half the lenght. So, first, we calculate the half of l, which would be

$\frac{l}{2}$

the part that says "4 less than" means that we should subtract 4 from the half of length. So we get

$\frac{l}{2}-4$

now, this expression should be equal to the width , that we'll note as w. So we end up with the equation

$w=\frac{l}{2}-4$

8 0

1 year ago

When eight times an unknown number is decreased by 208 the result is four times the unknown number.

Naddika [18.5K]

I think

This is your typical algebra question where you are looking for an unknown value given some information. The information can be set up as:
8 - x = 4*(x +3)

Distribute the 4:
8 - x = 4x + 12

Rearrange to get variables on one side:
8 - 12 = 4x + x

Simplifiy:
-4 = 5x

Isolate the variable:
-4/5 = x

6 0

3 years ago