Question

Change the subject of formulae for the indicated letter:
1. z = (a - b)/4b ; for b

Answer 1

z=(a-b)/4b
or z*4b =(a-b)
or 4zb+b=a
or b (4z+1)=a
or b= a/(4z+1) ...this is the ans

Answer 2

z=(a-b)/4b
4bz=a-b
4bz+b=a
b(4z+1)=a
b=a/4z+1