Need help. Soon.

sepuko

Distinguished
Dec 13, 2005
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Can anybody just show me how

/x./y.z+x./y./z+x./y.z=/y.(x+z)

where "/" means opposite. I know some of the rules, but i really can't think of the path to turn the left side in the right one. Can anybody show me?
 
I was already showed the way to proove the equation.
the "/" symbol is to assign the the variable has the opposite value. if x is a logical 1 /x is a logical zero and so on.