TRANSPOSITION OF FORMULAE D1

If M = u(b + a)    make a the subject of the formula.

             (b – a)

Solution

M = u(b + a)   

          (b – a)

(b – a) x M = u(b + a) x (b – a)   multiply by(b-a) on both sides.

                         (b – a)

(b – a) x M = u(b + a) open the brackets on both sides.

Mb – Ma = ub + ua

Mb – ub = Ma + ua   (collect the terms containing a together)

Mb – ub = a(M + u)

Mb – ub = a(M + u) ¹               Divide by (M + u) on both sides.

(M + u)       (M + u) ₁

Mb – ub = a

(M + u)        

Hence  a =   Mb – ub

                     (M + u)   

   TRY THIS………………….

 If M = u(c + e)    make e the subject of the formula.

              (c – e)