Solve the Fraction Equation: Balancing Terms in 7/9 - 3/5x + 1/4 = 2/8 - 3/7x + 6/10x

Linear Equations with Mixed Fractional Terms

Solve for X:


7935x+14=2837x+610x \frac{7}{9}-\frac{3}{5}x+\frac{1}{4}=\frac{2}{8}-\frac{3}{7}x+\frac{6}{10}x

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find X
00:03 Arrange the equation so that X is isolated on one side
00:49 Simplify what we can
00:56 Find the common denominator
01:01 Isolate X by multiplying by the reciprocal
01:15 Make sure to multiply numerator by numerator and denominator by denominator
01:21 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

Solve for X:


7935x+14=2837x+610x \frac{7}{9}-\frac{3}{5}x+\frac{1}{4}=\frac{2}{8}-\frac{3}{7}x+\frac{6}{10}x

2

Step-by-step solution

Let's solve for x x in the given equation through a structured approach:

We start with the equation:
7935x+14=2837x+610x \frac{7}{9} - \frac{3}{5}x + \frac{1}{4} = \frac{2}{8} - \frac{3}{7}x + \frac{6}{10}x Simplify where possible and combine like terms:

Step 1: Simplify constants and rearrange:
Convert to simplest forms:
- 28=14\frac{2}{8} = \frac{1}{4} and 610=35\frac{6}{10} = \frac{3}{5}.
Substitute these into the equation to get:
79+1435x=14+35x37x \frac{7}{9} + \frac{1}{4} - \frac{3}{5}x = \frac{1}{4} + \frac{3}{5}x - \frac{3}{7}x Cancelling out 14\frac{1}{4} on both sides simplifies it to:
7935x=35x37x \frac{7}{9} - \frac{3}{5}x = \frac{3}{5}x - \frac{3}{7}x

Step 2: Combine like terms containing x x :
The right side becomes:
35x37x=(2135x1535x)=635x \frac{3}{5}x - \frac{3}{7}x = \left(\frac{21}{35}x - \frac{15}{35}x\right) = \frac{6}{35}x Thus, we now have the equation:
79=635x \frac{7}{9} = \frac{6}{35}x

Step 3: Solve for x x :
Cross-multiply to solve for x x :
735=96x245=54xx=24554 7 \cdot 35 = 9 \cdot 6x \\ 245 = 54x \\ x = \frac{245}{54} Simplifying the fraction gives:
x=3554=12243 x = \frac{35}{54} = 1\frac{2}{243}

Therefore, the solution to the equation is x=12243 x = 1\frac{2}{243} .

3

Final Answer

12243 1\frac{2}{243}

Key Points to Remember

Essential concepts to master this topic
  • Simplification: Convert fractions to lowest terms: 28=14 \frac{2}{8} = \frac{1}{4} , 610=35 \frac{6}{10} = \frac{3}{5}
  • Technique: Find common denominator for like terms: 35x37x=2135x1535x=635x \frac{3}{5}x - \frac{3}{7}x = \frac{21}{35}x - \frac{15}{35}x = \frac{6}{35}x
  • Check: Substitute x=12243 x = 1\frac{2}{243} back into original equation to verify both sides equal ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to simplify fractions before combining
    Don't work with 28 \frac{2}{8} and 610 \frac{6}{10} as they are = harder calculations and wrong results! These unsimplified fractions make the algebra messy and increase error chances. Always reduce fractions to lowest terms first: 28=14 \frac{2}{8} = \frac{1}{4} and 610=35 \frac{6}{10} = \frac{3}{5} .

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 like 2/8 and 6/10 first?

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Simplified fractions make everything easier! Working with 14 \frac{1}{4} instead of 28 \frac{2}{8} reduces calculation errors and makes patterns clearer. Always simplify first - it saves time later!

How do I combine fractions with different denominators like 3/5x and 3/7x?

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Find the common denominator first! For denominators 5 and 7, the LCD is 35. Convert: 35x=2135x \frac{3}{5}x = \frac{21}{35}x and 37x=1535x \frac{3}{7}x = \frac{15}{35}x , then subtract: 2135x1535x=635x \frac{21}{35}x - \frac{15}{35}x = \frac{6}{35}x .

What does it mean when I get a mixed number like 1 2/243?

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A mixed number shows a whole part plus a fraction part. 12243 1\frac{2}{243} means 1+2243 1 + \frac{2}{243} , which equals the improper fraction 24554 \frac{245}{54} . Both forms are correct!

How can I check if x = 1 2/243 is really correct?

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Substitute back into the original equation! Replace every x with 12243 1\frac{2}{243} and calculate both sides. If they equal the same value, your answer is right. This step catches most errors!

Can I clear all fractions by multiplying both sides by a common denominator?

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Yes, but be careful! You'd need to multiply by the LCD of ALL denominators (9, 5, 4, 8, 7, 10). With so many fractions, it's often easier to simplify and combine like terms first, as shown in this solution.

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