If x = 10, y = 4, and z = 12, what is the value of x(z - y)?

Question:

If x = 10, y = 4, and z = 12, what is the value of x(z - y)?

Evaluating an Expression:

To evaluate an expression which is in terms of one or more variables at given values of variables, we just substitute the values of the variables in the given expression and simplify it.

Answer and Explanation:

The given values of the variables are:

$$x = 10\\ y = 4\\ z = 12 $$

Substitute these values in the given expression and simplify:

$$\begin{align} x(z - y) &= 10 (12-4) \\[0.4cm] &= 10(8) \\[0.4cm] &= \boxed{\mathbf{80}} \end{align} $$


Learn more about this topic:

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Evaluating Simple Algebraic Expressions

from ELM: CSU Math Study Guide

Chapter 6 / Lesson 3
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