MAKING THE SUBJECT 2

If D = y(w + a)    make a the subject of the formula.

             (w – a)

Solution

D = y(w + a)   

          (w – a)

(w – a) x D = y(w + a) x (w – a)   multiply by(w-a) on both sides.

                         (w – a)

(w – a) x D = y(w + a) open the brackets on both sides.

Dw – Da = yw + ya

Dw – wb = Da + ya   (collect the terms containing a together)

Dw – yw = a(D + y)

Dw – yw = a(D + y) ¹               Divide by (D + y) on both sides.

(D + y)         (D + y) ₁

Dw – yw = a

(D + y)        

Hence  a =   Dw – yw

                     D + y       

TRY THIS…………

If B = r(h + d)    make d the subject of the formula.

            (h – d)