Solve the Linear Challenge: Simplify and Balance 38x + 2 - 3 = 19x - 7x + 2

Linear Equations with Mixed Fractions

Solve for X:

38x+28145719=19x7x+168 38x+\frac{28}{14}-\frac{57}{19}=19x-7x+\frac{16}{8}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find X
00:04 Calculate the fraction terms
00:12 Collect like terms
00:33 Arrange the equation so that X is isolated on one side
00:50 Collect like terms
00:54 Isolate X
01:00 And this is the solution to the problem

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve for X:

38x+28145719=19x7x+168 38x+\frac{28}{14}-\frac{57}{19}=19x-7x+\frac{16}{8}

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Simplify each fraction in the equation.
  • Combine like terms involving x x on each side of the equation.
  • Isolate the variable x x to solve the equation.

Now, let's work through each step:

Step 1: Simplify the fractions:

  • 2814=2 \frac{28}{14} = 2
  • 168=2 \frac{16}{8} = 2
  • The equation becomes:
    38x+25719=19x7x+2 38x + 2 - \frac{57}{19} = 19x - 7x + 2

Step 2: Combine like terms and simplify the equation:

  • Simplify the right side:
    19x7x=12x 19x - 7x = 12x
  • The equation now is:
    38x+25719=12x+2 38x + 2 - \frac{57}{19} = 12x + 2
  • Eliminate the constant 2 2 from both sides:
    38x5719=12x 38x - \frac{57}{19} = 12x

Step 3: Isolate the variable x x :

  • Subtract 12x 12x from both sides:
    38x12x5719=0 38x - 12x - \frac{57}{19} = 0
  • The equation simplifies to:
    26x5719=0 26x - \frac{57}{19} = 0
  • Add 5719 \frac{57}{19} to both sides:
    26x=5719 26x = \frac{57}{19}
  • To isolate x x , divide both sides by 26 26 :
    x=5719×26 x = \frac{57}{19 \times 26}
  • Calculate 19×26=494 19 \times 26 = 494 , so:
    x=57494 x = \frac{57}{494}

Upon simplification, we find x=326 x = \frac{3}{26} .

Therefore, the solution to the problem is x=326 x = \frac{3}{26} .

3

Final Answer

326 \frac{3}{26}

Key Points to Remember

Essential concepts to master this topic
  • Simplification: First reduce all fractions to their simplest form
  • Technique: Combine like terms: 38x - 12x = 26x before isolating
  • Check: Substitute x=326 x = \frac{3}{26} back into original equation ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to simplify fractions at the beginning
    Don't leave fractions like 28/14 and 16/8 unsimplified = messy calculations and errors! This creates unnecessary complexity and increases chances of arithmetic mistakes. Always simplify fractions first to get cleaner numbers like 2.

Practice Quiz

Test your knowledge with interactive questions

Solve for X:

\( x - 3 + 5 = 8 - 2 \)

FAQ

Everything you need to know about this question

Why do I need to simplify fractions before solving?

+

Simplifying fractions like 2814=2 \frac{28}{14} = 2 makes calculations much easier! Working with whole numbers reduces errors and helps you see patterns more clearly.

How do I combine the x terms correctly?

+

On the right side: 19x7x=12x 19x - 7x = 12x . Think of it as having 19 apples, taking away 7 apples = 12 apples. The coefficient follows the same subtraction rule!

What if I can't reduce the final fraction?

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That's okay! 57494 \frac{57}{494} can be simplified by finding the GCD. Since 57 = 3 × 19 and 494 = 2 × 13 × 19, the GCD is 19, giving us 326 \frac{3}{26} .

How do I check my answer with fractions?

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Substitute x=326 x = \frac{3}{26} back into the original equation. Calculate each side separately and verify they're equal. Use a calculator for fraction arithmetic if needed!

Why did we subtract 2 from both sides?

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Since both sides had +2 +2 , subtracting 2 from both sides cancels them out. This simplifies the equation: 38x+25719=12x+2 38x + 2 - \frac{57}{19} = 12x + 2 becomes 38x5719=12x 38x - \frac{57}{19} = 12x .

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