Chapter 1: Q7 (page 10)

Find the value of the variable.
$3 x = 15$

Short Answer

Expert verified

The value of the variable is $x = 5$ .

Step by step solution

Step 1. Divide by 3.

To find the value of variable x in the equation $3 x = 15$ , divide both sides of the equation by 3.

$\frac{3 x}{3} = \frac{15}{3}$

Step 2. Simplify the equation.

To further simplify, cancel the common factors of 3.

$\begin{array}{l} \frac{3 x}{3} = \frac{5 \times 3}{3} \\ x = 5 \end{array}$

Step 3. Verify the value.

In order to verify the value of x, substitute 5 for x into the equation $3 x = 15$ .

$\begin{array}{l} 3 \times (5) = 15 \\ 15 = 15 True \end{array}$

Hence, the value of the variable is $x = 5$ .

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Find the value of the variable.
$3 x = 15$

Short Answer

Step by step solution

Step 1. Divide by 3.

Step 2. Simplify the equation.

Step 3. Verify the value.

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Find the value of the variable.3x=15

Short Answer

Step by step solution

Step 1. Divide by 3.

Step 2. Simplify the equation.

Step 3. Verify the value.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Probability and Statistics

Theoretical and Mathematical Physics

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Decision Maths

Statistics

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Study anywhere. Anytime. Across all devices.

Find the value of the variable.
$3 x = 15$