# Chapter 3 - Solving Inequalities - 3-3 Solving Inequalities Using Multiplication or Division - Practice and Problem-Solving Exercises - Page 182: 42

-5

#### Work Step by Step

To find the missing coefficient, transform the second equation such that the right side is -25. $x\leq-5\longrightarrow$ multiply both sides by -5; reverse the inequality $x\times-5\geq-5\times-5\longrightarrow$ multiply $-5x\geq25$ The missing coefficient of x is -5.

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