1: Simplify the problem by moving all similar figures together (normal numbers like 1 or -1 go to their side, numbers with letters attached go to a different side.)
2: Divide to get rid of the number attached to the letter. REMEMBER! Always do the same thing to both sides.
3: The answer with be _= number, or number=_ (i.e. 10=a or b=-6)
There is no such thing as a 2d cylinder because it is a three dimensional object. V=pi(radius2)height is the cylinder volume formula, base*height is the rectangle area formula, and the rectangle is the closest thing to a 2d cylinder. But it is possible to insert these equations, but you may need to use your keyboard on your device.