Solve for X: x + 2x/4x + 1/2 - 1/3 = 2x Algebraic Equation

Linear Equations with Fractional Terms

x+2x4x+1213=2x x+\frac{2x}{4x}+\frac{1}{2}-\frac{1}{3}=2x

x=? x=\text{?}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Simplify what we can
00:08 Break down 4 into factors 2 and 2
00:18 Simplify what we can
00:28 Group the factors
00:37 Isolate the unknown X
00:50 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

x+2x4x+1213=2x x+\frac{2x}{4x}+\frac{1}{2}-\frac{1}{3}=2x

x=? x=\text{?}

2

Step-by-step solution

To solve the problem, we will follow these steps:

  • Step 1: Simplify the fraction 2x4x\frac{2x}{4x}.
  • Step 2: Combine like terms on both sides of the equation.
  • Step 3: Solve for x x using algebraic operations.

Now, let's work through each step:

Step 1: Simplify the fraction.
The term 2x4x\frac{2x}{4x} simplifies to 12\frac{1}{2} because the xx terms cancel out, clearly assuming x0x \neq 0.

Step 2: Substitute and combine like terms.
The original equation becomes:

x+12+1213=2x x + \frac{1}{2} + \frac{1}{2} - \frac{1}{3} = 2x

This simplifies further by combining 12+12=1\frac{1}{2} + \frac{1}{2} = 1, so:

x+113=2x x + 1 - \frac{1}{3} = 2x

Simplify 1131 - \frac{1}{3} to 23\frac{2}{3}, yielding:

x+23=2x x + \frac{2}{3} = 2x

Step 3: Solve for x x .
Subtract x x from both sides to isolate terms involving x x :

23=2xx \frac{2}{3} = 2x - x

Simplifying, we have:

23=x \frac{2}{3} = x

Therefore, the value of x x that satisfies the equation is 23 \frac{2}{3} .

3

Final Answer

23 \frac{2}{3}

Key Points to Remember

Essential concepts to master this topic
  • Simplification: Cancel common factors in fractions like 2x4x=12 \frac{2x}{4x} = \frac{1}{2}
  • Technique: Combine like terms: 12+12=1 \frac{1}{2} + \frac{1}{2} = 1 and 113=23 1 - \frac{1}{3} = \frac{2}{3}
  • Check: Substitute x=23 x = \frac{2}{3} back: 23+23=43=223 \frac{2}{3} + \frac{2}{3} = \frac{4}{3} = 2 \cdot \frac{2}{3}

Common Mistakes

Avoid these frequent errors
  • Not simplifying the fraction 2x/4x correctly
    Don't leave 2x4x \frac{2x}{4x} as is = complex equation with extra variables! This makes the problem unnecessarily difficult and leads to wrong calculations. Always cancel common factors first: 2x4x=12 \frac{2x}{4x} = \frac{1}{2} (when x ≠ 0).

Practice Quiz

Test your knowledge with interactive questions

\( x+7=14 \)

\( x=\text{?} \)

FAQ

Everything you need to know about this question

Why does 2x/4x simplify to 1/2?

+

When x ≠ 0, you can cancel the common factor x from numerator and denominator: 2x4x=24=12 \frac{2x}{4x} = \frac{2}{4} = \frac{1}{2} . It's like canceling out identical terms!

How do I combine 1/2 + 1/2 - 1/3?

+

Work left to right: 12+12=1 \frac{1}{2} + \frac{1}{2} = 1 , then 113=3313=23 1 - \frac{1}{3} = \frac{3}{3} - \frac{1}{3} = \frac{2}{3} . Always use common denominators when adding or subtracting fractions.

What if x equals zero in the original equation?

+

If x = 0, then 2x4x=00 \frac{2x}{4x} = \frac{0}{0} which is undefined! This means x = 0 is not allowed in the domain of this equation.

How do I isolate x when I have x + 2/3 = 2x?

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Subtract x from both sides: 23=2xx=x \frac{2}{3} = 2x - x = x . The key is to get all x terms on one side and constants on the other.

Should I convert everything to decimals instead?

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Keep fractions as fractions! Converting to decimals can introduce rounding errors. Fractions like 23 \frac{2}{3} are exact, while 0.667 is just an approximation.

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