Here's the first one:
This is a pitiful attempt at drawing a rectangle but I think you can get the gist of it, right?
Let x = the width of the rectangle
If the length is 3 more than 2 times its width then, length = 2x +3
2x + 3
|_________________| x *this is supposed to be a rectangle, i put the equation for the length above it (2x+3)
Perimeter of a rectangle = 2(length) + 2(width)
96 = 2(x) + 2(2x+3)
Solve for x. x is your width, but the question is asking for the length. You can plug your answer for x into the equation for the length and find the length.
Ok? Good luck!!