Posted by **Megan** on Thursday, March 13, 2008 at 10:11pm.

Help! I think I am right, but not sure.

Factor out greatest common factor then simplify the factors

15wx-20wy-25wz=

5w(3x)+5w(-4y)+5w(-5z)=

5w(3w-4y-5z)=

5w

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