Chapter 2: Q16. (page 100)

Solve each equation. Check your solution.
$8 = 4 (r + 4)$

Short Answer

Expert verified

The solution of the given equation is $r = - 2$ .

Step by step solution

Step 1. Write the given equation.

The given equation is “ $8 = 4 (r + 4)$ ”.

Step 2. Solve the given equation.

Solving,

$8 = 4 (r + 4)$ (Given equation)

$\frac{8}{4} = \frac{4 (r + 4)}{4}$ (Divide both sides by 4)

$2 = r + 4$ (Simplify)

$2 - 4 = r + 4 - 4$ (Subtract 4 from both sides)

$- 2 = r$ (Simplify)

$r = - 2$ (Write the variable on the left-hand side)

So, $r = - 2$ is the solution of the given equation.

Step 3. Check the obtained solution.

Put $r = - 2$ in the given equation $8 = 4 (r + 4)$ to get,

$\begin{array}{l} 8 = 4 (- 2 + 4) \\ 8 = 4 (2) \\ 8 = 8 \end{array}$

Since the value obtained on the left-hand side and right-hand side are equal, the obtained value is indeed a solution of the given equation.

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Solve each equation. Check your solution.
$8 = 4 (r + 4)$

Short Answer

Step by step solution

Step 1. Write the given equation.

Step 2. Solve the given equation.

Step 3. Check the obtained solution.

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Solve each equation. Check your solution.8=4r+4

Short Answer

Step by step solution

Step 1. Write the given equation.

Step 2. Solve the given equation.

Step 3. Check the obtained solution.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Geometry

Mechanics Maths

Pure Maths

Decision Maths

Statistics

Applied Mathematics

Study anywhere. Anytime. Across all devices.

Solve each equation. Check your solution.
$8 = 4 (r + 4)$