# Chapter 6 - Section 6.1 - The Greatest Common Factor - Practice: 15

$(3y+1)(x-4)$

#### Work Step by Step

$3xy-4+x-12y$ $= 3xy - 12 y + x-4$ $= 3y(x-4) + 1(x-4)$ Factor out the common factor, $(x-4)$. $= (3y+1)(x-4)$

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