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Solving an Inequality In Exercises \(67-72,\) solve the inequality. (Round your answers to two decimal places.)$$\frac{1}{2.3 x-5.2}>3.4$$

Short Answer

Expert verified
x < 2.36

Step by step solution

01

Identify Original Inequality

Start by writing down the original inequality, which is \(\frac{1}{2.3 x-5.2}>3.4\).
02

Clear the Fraction

Multiply every term by \(2.3x-5.2\) to get rid of the fraction. When doing this, remember to change the direction of the inequality because \(2.3x-5.2\) is possibly less than zero. This results in \(1 < 3.4 (2.3x-5.2)\).
03

Expand and Rearrange the Inequality

Expand the right side to get \(1 < 7.82x -17.48\). After that, subtract \(7.82x\) from both sides and add \(17.48\) to both sides, resulting in the inequality \(17.48 > 7.82x -1 \). Add 1 to both sides to get \(18.48 > 7.82x\).
04

Solve for x

Divide both sides by 7.82 to isolate x: \(x < \frac{18.48}{7.82}\). Now, perform the division to get the final answer.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Algebra
Algebra is the branch of mathematics dealing with symbols and rules for manipulating those symbols. In this context, we encounter equations and inequalities, each serving their distinct purposes.
Unlike equations, which express equality between two expressions, inequalities indicate that one expression is larger or smaller than another. They're crucial in expressing a range of possible values.
Understanding these symbols and becoming comfortable using them simplifies problem-solving tasks, as seen in the example provided. By changing the roles of the variables and constants, inequalities like \(\frac{1}{2.3x-5.2} > 3.4\) demonstrate how to show relationships between not-so-clear values.
  • Equality versus Inequality: Unlike equations, inequalities often describe unlimited sets of solutions. Learn them thoroughly to solve complex problems.
  • Manipulation Techniques: Mastering these skills helps to structure and solve problems with more ease and accuracy.
Algebra acts as a language, and by mastering it, you gain the ability to translate complex real-world issues into mathematical terms.
Fraction Inequality
In solving inequalities involving fractions, like \(\frac{1}{2.3x - 5.2} > 3.4\), certain steps can simplify the process. Unlike regular equations, we are often faced with additional rules in inequalities, particularly when it involves fractions.
The primary trick here is to eliminate the fraction by multiplying through by the denominator. However, a critical point to remember is flipping the inequality sign in case the denominator could be negative. This shift in sign acknowledges that multiplying or dividing by a negative value reverses the inequality direction.
Consider these tips:
  • Always watch for negative values: If the denominator can switch sign, the entire inequality switches as well.
  • Clear fractions early: It helps in simplifying and working through any mathematical expression more efficiently.
Mastering these small steps ensures correct results. They serve as the key to unlocking the greater picture when dealing with inequalities.
Linear Inequalities
Linear inequalities behave quite like linear equations but represent a range of solutions instead of a single solution. Solving the inequality \(1 < 7.82x - 17.48\) involves simplifying the terms similarly to equations but keeping in mind the inequalities.
Isolating the variable is crucial and usually involves rearranging terms to one side while leaving the variable on the other. Remember to do the same arithmetic operations on both sides to maintain balance.
Here are some useful points to remember:
  • Arithmetic Consistency: Apply addition, subtraction, multiplication, or division equally to both sides.
  • Checking Direction: Multiplying or dividing by a negative number mandates flipping the inequality sign.
Linear inequalities are fundamental in constructing and understanding constraints for diverse applications, from everyday budgeting to complex engineering problems. They allow for possibilities within boundaries, offering a versatile approach to modeling and problem-solving.

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