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 the equation

\( 5x-15=30 \)

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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