Solve for X in the Equation: 6/10 - 30x + 1/4 = 6/8 - 16x

Linear Equations with Mixed Fractions

Solve for X:

61030x+14=6816x \frac{6}{10}-30x+\frac{1}{4}=\frac{6}{8}-16x

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:12 Let's start by finding X.
00:15 First, rearrange the equation so X is on one side by itself.
00:46 Now, break down 6 into two times three, and 10 into two times five.
00:56 Great job! Next, simplify any terms you can.
01:05 Let's again factor 6 into two and three, and 8 into two and four.
01:11 Keep it up! Simplify any possible terms here too.
01:20 Gather all similar terms together.
01:36 Then multiply by the denominators to get a common denominator.
02:03 Now, isolate X on one side of the equation.
02:11 Remember, multiply numerators together and denominators together.
02:16 And that's how you find the solution to this problem.

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve for X:

61030x+14=6816x \frac{6}{10}-30x+\frac{1}{4}=\frac{6}{8}-16x

2

Step-by-step solution

To solve the equation 61030x+14=6816x \frac{6}{10} - 30x + \frac{1}{4} = \frac{6}{8} - 16x , follow these steps:

  • Step 1: Simplify the fractions involved. We have 610=35 \frac{6}{10} = \frac{3}{5} and 68=34 \frac{6}{8} = \frac{3}{4} .
  • Step 2: The equation becomes 3530x+14=3416x \frac{3}{5} - 30x + \frac{1}{4} = \frac{3}{4} - 16x .
  • Step 3: Combine the constant terms on each side. The left side is 35+14\frac{3}{5} + \frac{1}{4}. Find a common denominator, which is 20:
  • 35=1220\frac{3}{5} = \frac{12}{20}
  • 14=520\frac{1}{4} = \frac{5}{20}
  • So, 35+14=1220+520=1720\frac{3}{5} + \frac{1}{4} = \frac{12}{20} + \frac{5}{20} = \frac{17}{20}.
  • Step 4: Substitute back into the equation: 172030x=3416x\frac{17}{20} - 30x = \frac{3}{4} - 16x.
  • Step 5: Simplify the right side. 34=1520\frac{3}{4} = \frac{15}{20}, so the equation becomes 172030x=152016x \frac{17}{20} - 30x = \frac{15}{20} - 16x .
  • Step 6: Subtract 1520\frac{15}{20} from both sides to get 1720152030x=16x\frac{17}{20} - \frac{15}{20} - 30x = -16x:
  • 17201520=220=110\frac{17}{20} - \frac{15}{20} = \frac{2}{20} = \frac{1}{10}.
  • So, the equation becomes 11030x=16x\frac{1}{10} - 30x = -16x.
  • Step 7: Rearrange the equation to solve for x x by adding 30x 30x to both sides: 110=30x16x\frac{1}{10} = 30x - 16x.
  • Step 8: Simplify the equation: 110=14x\frac{1}{10} = 14x.
  • Step 9: Divide both sides by 14 to solve for x x : x=110×14=1140 x = \frac{1}{10 \times 14} = \frac{1}{140}.

Therefore, the solution to the problem is x=1140 x = \frac{1}{140} .

3

Final Answer

1140 \frac{1}{140}

Key Points to Remember

Essential concepts to master this topic
  • Fraction Rule: Simplify all fractions first before solving
  • Technique: Find common denominators: 35+14=1720 \frac{3}{5} + \frac{1}{4} = \frac{17}{20}
  • Check: Substitute x=1140 x = \frac{1}{140} back into original equation ✓

Common Mistakes

Avoid these frequent errors
  • Adding fractions without finding common denominators
    Don't add 35+14=49 \frac{3}{5} + \frac{1}{4} = \frac{4}{9} = wrong answer! This ignores fraction rules and creates incorrect calculations. Always find the LCD (20) and convert: 1220+520=1720 \frac{12}{20} + \frac{5}{20} = \frac{17}{20} .

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?

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Simplifying fractions like 610=35 \frac{6}{10} = \frac{3}{5} makes the numbers smaller and easier to work with. It also helps you spot patterns and avoid calculation errors!

How do I add fractions with different denominators?

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Find the LCD (Least Common Denominator) first! For 35+14 \frac{3}{5} + \frac{1}{4} , the LCD is 20. Convert both: 1220+520=1720 \frac{12}{20} + \frac{5}{20} = \frac{17}{20} .

What if my final answer is a tiny fraction like 1/140?

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That's completely normal! Many linear equations have small fractional solutions. Just make sure it's in simplest form and always verify by substituting back.

Can I use decimals instead of fractions?

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Yes, but be careful with rounding! Converting 11400.00714 \frac{1}{140} ≈ 0.00714 might introduce errors. Fractions give exact answers, so they're usually better for equations.

How do I move terms with x to one side?

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Add or subtract the x-terms from both sides. In this problem: 30x+16x=14x -30x + 16x = -14x moves to one side, leaving 110=14x \frac{1}{10} = 14x .

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