Chapter 1: Problem 41
Solve each equation. Check your solutions. \(16 t=4|3 t+8|\)
Short Answer
Expert verified
The solution to the equation is \(t = 8\).
Step by step solution
01
Understand the Equation
We are given the equation \(16t = 4|3t + 8|\). Our goal is to find the value(s) of \(t\) that satisfy this equation.
02
Simplify the Equation
First, divide both sides by 4 to simplify the equation: \(\frac{16t}{4} = \frac{4|3t + 8|}{4}\). This simplifies to \(4t = |3t + 8|\).
03
Analyze the Absolute Value
The equation \(4t = |3t + 8|\) can create two scenarios due to the absolute value.1. \(4t = 3t + 8\) (when \(3t + 8\) is positive or zero)2. \(4t = -(3t + 8)\) (when \(3t + 8\) is negative)
04
Solve the First Case
For the first case, solve \(4t = 3t + 8\).Subtract \(3t\) from both sides: \[4t - 3t = 8\] This simplifies to \[t = 8\].
05
Solve the Second Case
For the second case, solve \(4t = -(3t + 8)\).Distribute the negative sign:\[4t = -3t - 8\]. Add \(3t\) to both sides:\[4t + 3t = -8\] This simplifies to \[7t = -8\].Divide by 7:\[t = -\frac{8}{7}\].
06
Check Solutions for Validity
For \(t = 8\):Plug back into the original equation:\[16(8) = 4|3(8) + 8|\] \[128 = 4|24 + 8|\] \[128 = 4(32)\] \[128 = 128\].For \(t = -\frac{8}{7}\):Plug back into the original equation:\[16\left(-\frac{8}{7}\right) = 4|3\left(-\frac{8}{7}\right) + 8|\] \[-\frac{128}{7} = 4|-\frac{24}{7} + \frac{56}{7}|\] \[-\frac{128}{7} = 4|\frac{32}{7}|\] \[-\frac{128}{7} = \frac{128}{7}\],which is not true.
07
State the Valid Solution
Since only \(t = 8\) satisfies the original equation, \(t = -\frac{8}{7}\) is not valid. Hence, the solution is \(t = 8\).
Unlock Step-by-Step Solutions & Ace Your Exams!
-
Full Textbook Solutions
Get detailed explanations and key concepts
-
Unlimited Al creation
Al flashcards, explanations, exams and more...
-
Ads-free access
To over 500 millions flashcards
-
Money-back guarantee
We refund you if you fail your exam.
Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!
Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Understanding Absolute Value Equations
When you encounter an absolute value equation like \(16t = 4|3t + 8|\), it is crucial to understand that the absolute value affects how you approach solving the problem. The absolute value \(|x|\) signifies the 'distance' of \(x\) from zero on the number line, meaning it always results in a non-negative value. This introduces two different scenarios into your equation:
- The expression inside the absolute value is non-negative, i.e., \(3t + 8 \geq 0\)
- The expression inside the absolute value is negative, i.e., \(3t + 8 < 0\)
Mastering Algebraic Manipulation
Algebraic manipulation is the toolset you'll need to solve the linear equations derived from our absolute value problem. For instance, after simplifying the original equation to \(4t = |3t + 8|\), you break it down into two parts:
- \(4t = 3t + 8\), which when rearranged becomes \(t = 8\)
- \(4t = -(3t + 8)\), which when simplified gives \(7t = -8\) and further processing results in \(t = -\frac{8}{7}\)
The Importance of Checking Solutions
After solving the absolute value equation, checking your solutions is a crucial step. This ensures that every proposed solution is valid for the original equation. For our solution \(t = 8\), substituting back into the initial equation \(16t = 4|3t + 8|\) shows:\[16(8) = 4|3(8) + 8|\] translates to \[128 = 128\], confirming that \(t = 8\) works.For \(t = -\frac{8}{7}\), the substitution leads to an inconsistency:\[16\left(-\frac{8}{7}\right) = 4|-\frac{24}{7} + \frac{56}{7}|\] becomes untrue as \[-\frac{128}{7} eq \frac{128}{7}\].Thus, validation through substitution differentiates between feasible and infeasible solutions. Only \(t = 8\) is valid, underscoring this critical checking step. Verification prevents errors and assures accurate completion of equation-solving tasks.