Question 31545
1/2b-1/2=1/4b or 1/2b-1/4b=1/2 or (2-1)/4b=1/2 or 1/4b=1/2 or 4b=2 or b=2/4 
or b=1/2

proof 1/(2x(1/2))-1/2=1/(4x(1/2)) or 1/1-1/2=1/2 or 1-1/2=1/2 or 1/2=1/2