Chapter 1 - Foundations for Algebra - 1-6 Multiplying and Dividing Real Numbers - Practice and Problem-Solving Exercises - Page 43: 53

$−2×x×y×z .$

We know that we need an expression with x, y, and z in it. To make it simpler, we will multiply the three numbers together. Because $x×y×z$ equals -6 right now, we must multiply -6 by a number to get 12. We know that -6 times -2 is 12, so we get the expression: $−2×x×y×z.$