Solve Linear Equation: -7+3x-8x=9+3-5x for Parameter X

Linear Equations with No Solution

Find the value of the parameter X

7+3x8x=9+35x -7+3x-8x=9+3-5x

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve the following expression
00:03 Collect terms
00:24 Isolate the unknown X
00:42 Reduce wherever possible
00:47 All unknowns cancel each other out therefore there is no solution to the question
00:51 Here is the solution

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Find the value of the parameter X

7+3x8x=9+35x -7+3x-8x=9+3-5x

2

Step-by-step solution

To solve this equation for x x , we will follow these steps:

  • Simplify both sides of the equation by combining like terms.
  • Rearrange the equation to isolate the variable x x .
  • Analyze the resultant equation to determine the solution.

Let's break it down:

Step 1: Simplify the left side:
The left side of the equation is 7+3x8x -7 + 3x - 8x . Combine the like terms 3x 3x and 8x-8x:
7+(3x8x)=75x -7 + (3x - 8x) = -7 - 5x

Step 2: Simplify the right side:
The right side of the equation is 9+35x 9 + 3 - 5x . Combine the constant terms 9 9 and 3 3 :
(9+3)5x=125x (9 + 3) - 5x = 12 - 5x

Step 3: Set the simplified equation:
Now the equation is:
75x=125x -7 - 5x = 12 - 5x

Step 4: Analyze the equation:
If we attempt to isolate x x by adding 5x 5x to both sides, we get:
7=12 -7 = 12

This statement is false. Since the manipulation leads to a false statement without any variable x x , the original equation has no solution.

Therefore, the equation cannot be true for any real number value of x x . Thus, the correct answer is: no solution.

3

Final Answer

No solution

Key Points to Remember

Essential concepts to master this topic
  • Combine Like Terms: Simplify both sides before moving variables
  • Technique: When 5x=5x -5x = -5x , add 5x to cancel variables
  • Check: If constants create false statement like -7 = 12, no solution exists ✓

Common Mistakes

Avoid these frequent errors
  • Assuming every equation has a solution
    Don't keep trying to solve when you get -7 = 12 or similar false statements! This contradictory result means the equation is impossible to satisfy. Always recognize that when variables cancel and leave a false statement, the answer is 'no solution'.

Practice Quiz

Test your knowledge with interactive questions

\( x+7=14 \)

\( x=\text{?} \)

FAQ

Everything you need to know about this question

How can an equation have no solution?

+

When you simplify and get a false statement like -7 = 12, it means there's no value of x that makes the original equation true. The equation is inconsistent!

What's the difference between no solution and x = 0?

+

No solution means the equation is impossible. x = 0 means zero is the answer. If you substitute x = 0 and both sides equal the same number, then 0 is the solution!

Did I make a mistake if I get -7 = 12?

+

No! Getting 7=12 -7 = 12 after combining like terms is the correct result. This false statement tells you the equation has no solution.

How do I write 'no solution' as an answer?

+

You can write it several ways: "No solution", "∅" (empty set), or "Inconsistent equation". All mean the same thing!

Should I double-check by substituting a number?

+

Yes! Try substituting any number for x in the original equation. You'll see that both sides never equal each other, confirming there's no solution.

🌟 Unlock Your Math Potential

Get unlimited access to all 18 Linear Equations (One Variable) questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations