Question 976683
x and y, dimensions;
u, the uniform width around the rectangle made by x and y;
A, the area of the border around rectangle made by x and y.


One of your listed dimension values is not acceptable if your garden is a rectangle.  You can only have any TWO of them; NOT three of them.  Decide which of the two listed values will be your rectangle's dimensions.


x and y, supposed to be known, and given.
u, the unknown.
A=240.


{{{highlight_green((x+2u)(y+2u)-xy=A)}}}, quadratic equation, unsimplified, in the variable, u.


Solve for u.