If xy+3z = x(y+z), which of the following must be true?
Pick
A) 1. x=3 and z=0  B) 2. x=1 and y=1  C) 3. y=1 and z=0  D) 4. x=1 or y=0  E) 5. x=1 or z=0
xy+3z=x(y+z)   xy+3z=xy+xz   3z=xz   it means x=3 or z=0   1. x=3 and z=0nswer 1. x=3 and z=0
<result>A</result>
If xy+3z = x(y+z), which of the following must be true?