# Chapter 2 - Real Numbers - Chapter 2 Test: 18

$-x+5xy$

#### Work Step by Step

To simplify the expression in the question, we group together the similar terms and then perform addition/subtraction: $3x-2xy-4x+7xy$ =$3x-4x-2xy+7xy$ =$(3x-4x)+(-2xy+7xy)$ =$(-x)+(5xy)$ =$-x+5xy$

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