Chapter 1: Q75. (page 32)

Solve the equation.
$4.2 x + 6.4 = 40$

Short Answer

Expert verified

The solution is $x = 8$ .

Step by step solution

Step 1- Consider the equation.

Consider the equation $4.2 x + 6.4 = 40$ .

Subtract 40 from both sides of the equation.

Step 2- Step description.

$\begin{array}{l} 4.2 x + 6.4 = 40 \\ 4.2 x + 6.4 - 40 = 0 \end{array}$

Step 3- Step description.

Simplify the equation as follows:

$\begin{matrix} 4.2 x + 6.4 - 40 = 0 \\ 4.2 x - 33.6 = 0 \\ 4.2 x = 33.6 \end{matrix}$

Divide both sides of the equation by 4.2.

$\begin{array}{l} 4.2 x = 33.6 \\ x = \frac{33.6}{4.2} \\ x = 8 \end{array}$

Therefore, the solution is $x = 8$ .

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Solve the equation.
$4.2 x + 6.4 = 40$

Short Answer

Step by step solution

Step 1- Consider the equation.

Step 2- Step description.

Step 3- Step description.

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Solve the equation.4.2x+6.4=40

Short Answer

Step by step solution

Step 1- Consider the equation.

Step 2- Step description.

Step 3- Step description.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Applied Mathematics

Geometry

Logic and Functions

Statistics

Decision Maths

Theoretical and Mathematical Physics

Study anywhere. Anytime. Across all devices.

Solve the equation.
$4.2 x + 6.4 = 40$