Solve for X in the Equation: 5(2-x)+2x=3(4-x)

Linear Equations with No Solution

Solve for x:

5(2x)+2x=3(4x) 5(2-x)+2x=3(4-x)

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find X
00:04 Open parentheses properly, multiply by each factor
00:21 Collect terms
00:29 Arrange the equation so that only the unknown X is on one side
00:47 Collect terms
00:51 We got an illogical expression therefore there is no solution

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve for x:

5(2x)+2x=3(4x) 5(2-x)+2x=3(4-x)

2

Step-by-step solution

Let's solve the equation 5(2x)+2x=3(4x) 5(2-x) + 2x = 3(4-x) step by step:

First, apply the distributive property to both sides of the equation:

  • Left side: 5(2x)=525x=105x 5(2-x) = 5 \cdot 2 - 5 \cdot x = 10 - 5x .
  • Right side: 3(4x)=343x=123x 3(4-x) = 3 \cdot 4 - 3 \cdot x = 12 - 3x .

Substituting back, the equation becomes:

105x+2x=123x 10 - 5x + 2x = 12 - 3x .

Next, combine like terms on the left side:

103x=123x 10 - 3x = 12 - 3x .

At this point, notice that the terms involving x x on both sides are identical (3x-3x). This means the terms containing x x cancel each other out:

10=12 10 = 12 .

Since 1012 10 \neq 12 , we encounter a contradiction.

This implies that there is no solution to the equation. The given equation represents parallel lines that never intersect, so there is no value of x x that satisfies the equation.

Therefore, the solution to the problem is There is no solution.

3

Final Answer

There is no solution.

Key Points to Remember

Essential concepts to master this topic
  • Distributive Property: Apply multiplication to each term inside parentheses
  • Technique: Combine like terms: 5x+2x=3x -5x + 2x = -3x
  • Check: When variables cancel leaving false statement, no solution exists ✓

Common Mistakes

Avoid these frequent errors
  • Continuing to solve after variables cancel
    Don't keep trying to isolate x when you get 10 = 12! This false statement means no solution exists. Always recognize when identical variable terms on both sides cancel out, leaving only constants that don't equal each other.

Practice Quiz

Test your knowledge with interactive questions

\( 5x=0 \)

FAQ

Everything you need to know about this question

What does 'no solution' actually mean?

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No solution means there is no value of x that makes the equation true. It's like saying "find a number where 10 equals 12" - impossible!

How do I know when an equation has no solution?

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Look for this pattern: after simplifying, the variable terms are identical on both sides but the constants are different. For example: 3x+10=3x+12 -3x + 10 = -3x + 12 becomes 10=12 10 = 12 (false!).

Did I make a mistake if I get no solution?

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Not necessarily! Some equations are designed to have no solution. Always double-check your algebra, but if your work is correct, "no solution" is a valid answer.

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

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Very different! x=0 x = 0 means zero is the solution. "No solution" means no number works. Think of it as "impossible" versus "the answer is zero."

Can I write 'no solution' as a number?

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No! Never write no solution as 0 or any number. The correct ways to express this are: "No solution," "No real solution," or use the symbol \emptyset (empty set).

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