A) W=fx To get ‘x’ by itself, divide BOTH sides of the equation by f

1) W/f = xf/f The ‘f’s cancel and you are left with:

2) W/f = x

B) g=f/x Now again you want to get ‘x’ by itself. So first you want to multiple each side by ‘x’ (to get x out of the denominator)

1) gx = x(f/x) The ‘x’s cancel and you are left with:

2) gx = f Now you still want ‘x’ by itself so divide by ‘g’:

3) (gx)/g = f/g The ‘g’s cancel and:

4) x = f/g

C) You should be able to figure it out by the previous examples

D) S= (ax^2)/2 First you want to multiply everything by ‘2’

1) 2s = 2((ax^2)/2) The ‘2’s cancel

2) 2s = ax^2 Now you want to get ‘x’ on one side, so divide by ‘a’

3) (2s)/a = (ax^2)/a The ‘a’s cancel:

4) (2s)/a = x^2 Now just square root each side

So the answer would be:

X = Plus or Minus The square root of (2s)/a