If y=kx is divided by k, then y/k=kx/k, that is, y/k=x. By the symmetric property of equality, if a=b, then b=a. In our case, this means that if y/k=x, then x=y/k.
In other words, one deduced x=y/k.
Thus, the Property (1) holds true: if y=kx, then x=y/k.
A well-known Formula (2) states that in=2.54*cm.
Imagine that y is measured in inches (in), x is measured in centimeters (cm).
Applying Property (1) to Formula (2) one gets
cm=in /2.54=0.39370079 in.
Then 0.8 cm=0.8 in/2.54=0.8*0.39370079 in.
I did not understand how 0.8 cm=0.8/2.54 inches............. i know that 1cm= 0.3937 inches............From where this 2.54 came? plz tell me