You could distribute this expression to get and even MORE simplified expression. Add the two terms in the parentheses together so that you get 4(7x). Now you can simply multiply 4 by 7x which would equal 28x. The new expression is 28x.
The mechanical advantage is found by dividing Rw by Ra:
Mechanical advantage = 18 / 2 = 9
One foot = 0.3048 meters
so 60 feet = 0.3048 * 60 = 18.29 meters to nearest 1/100
