You can
put this solution on YOUR website!The ladder against the wall makes a right triangle.
The hypotenuse, H, is the ladder length, 25 feet.
One side of the triangle,

is 7 feet.
What is the other length,

?
From Pythagorean theorem,
The ladder will be 14 feet away from the wall.
You probably want to move it a little closer before you take that first step.