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(y-1)(y-7)=0

(y-1)(y-7)=0
 
Y=?

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Dawn Z. | Unique and Effective Math Skills TutorUnique and Effective Math Skills Tutor
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Y has two answers for this problem. 
1 and 7.
 
To show this, set both ( ) = 0 separately.
 
y-1 = 0                y-7 = 0
  +1   +1                +7   +7
y = 1                   y = 7