Solve for X: 1/7x - 0.5 + 2/14x = 2/7x + 8.5

Linear Equations with No Solution

Solve for X:

17x0.5+214x=27x+8.5 \frac{1}{7}x-0.5+\frac{2}{14}x=\frac{2}{7}x+8.5

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find X
00:05 Decompose 14 into factors 2 and 7
00:22 Simplify what we can
00:33 Collect terms
00:42 Arrange the equation so that one side has only the unknown X
00:53 We got an illogical expression therefore there is no solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve for X:

17x0.5+214x=27x+8.5 \frac{1}{7}x-0.5+\frac{2}{14}x=\frac{2}{7}x+8.5

2

Step-by-step solution

To solve the equation 17x0.5+214x=27x+8.5 \frac{1}{7}x - 0.5 + \frac{2}{14}x = \frac{2}{7}x + 8.5 , we need to proceed with the following steps:

  • Step 1: Simplify the equation by combining like terms.

Examine the left-hand side (LHS):

17x+214x0.5 \frac{1}{7}x + \frac{2}{14}x - 0.5

Firstly, note that 214 \frac{2}{14} simplifies to 17 \frac{1}{7} . Therefore, the LHS becomes:

17x+17x0.5 \frac{1}{7}x + \frac{1}{7}x - 0.5 .

Combine like terms:

(17x+17x)0.5=27x0.5 \left(\frac{1}{7}x + \frac{1}{7}x\right) - 0.5 = \frac{2}{7}x - 0.5 .

  • Step 2: Compare both sides of the equation.

The right-hand side (RHS) is:

27x+8.5 \frac{2}{7}x + 8.5 .

Substitute the simplified LHS and RHS:

27x0.5=27x+8.5 \frac{2}{7}x - 0.5 = \frac{2}{7}x + 8.5 .

  • Step 3: Analyze the equation for a solution.

Subtract 27x \frac{2}{7}x from both sides:

0.5=8.5-0.5 = 8.5.

This results in a contradiction, since 0.5-0.5 does not equal 8.58.5.

  • Conclusion:

The equation does not have a solution. The coefficients of x x cancel each other out, and the remaining statement is false, indicating that no value of x x can satisfy the equation.

Therefore, the correct answer is: "No solution".

3

Final Answer

No solution

Key Points to Remember

Essential concepts to master this topic
  • Simplification: First combine like terms on each side
  • Technique: 214=17 \frac{2}{14} = \frac{1}{7} so 17x+214x=27x \frac{1}{7}x + \frac{2}{14}x = \frac{2}{7}x
  • Check: When variables cancel and constants contradict, no solution exists ✓

Common Mistakes

Avoid these frequent errors
  • Stopping when you get a false statement like -0.5 = 8.5
    Don't assume you made an error when constants don't match = giving up too early! This contradiction actually tells you the answer. Always recognize that false statements mean 'no solution'.

Practice Quiz

Test your knowledge with interactive questions

Solve for X:

\( 6 - x = 10 - 2 \)

FAQ

Everything you need to know about this question

What does 'no solution' actually mean?

+

It means no value of x can make the equation true. When you simplify and get something impossible like 0.5=8.5 -0.5 = 8.5 , that's your answer!

How is this different from x = 0?

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Very different! If x = 0, then 0 is the solution. No solution means not even 0 works - absolutely no number satisfies the equation.

Did I make a mistake if I get -0.5 = 8.5?

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No! This contradiction is the correct result. It proves the original equation is impossible to solve. Double-check your algebra, but the false statement is your final answer.

Why do the x terms cancel out?

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After simplifying, both sides had 27x \frac{2}{7}x . When you subtract 27x \frac{2}{7}x from both sides, they disappear, leaving only the contradictory constants.

Can equations have no solution?

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Yes! There are three possibilities: one solution (like x = 5), infinitely many solutions (like 2 = 2), or no solution (like our -0.5 = 8.5).

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

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Write it clearly as "No solution" or use the symbol \emptyset (empty set). Never leave it blank or write "undefined".

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