Solve for X: -22x + 35 - 4x = 31 - 8 + 10x Linear Equation

Linear Equations with Multi-Step Simplification

Solve for X:

22x+354x=318+10x -22x+35-4x=31-8+10x

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find X
00:04 Collect like terms
00:21 Arrange the equation so that X is isolated on one side
01:10 Isolate X
01:24 Factor 36 into 12 and 3
01:31 Simplify what we can
01:36 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:

22x+354x=318+10x -22x+35-4x=31-8+10x

2

Step-by-step solution

Let's solve the equation step by step:

Given equation: 22x+354x=318+10x -22x + 35 - 4x = 31 - 8 + 10x .

First, simplify both sides by combining like terms.

On the left side:

  • Combine all terms with x x : 22x4x=26x -22x - 4x = -26x .
  • The constant term remains: +35 +35 .
  • So, the left side simplifies to: 26x+35 -26x + 35 .

On the right side:

  • Simplify constants: 318=23 31 - 8 = 23 .
  • The term with x x remains: +10x +10x .
  • So, the right side simplifies to: 23+10x 23 + 10x .

The equation now is: 26x+35=23+10x -26x + 35 = 23 + 10x .

Next, move all terms involving x x to one side and constant terms to the other side:

  • Subtract 10x 10x from both sides: 26x10x+35=23 -26x - 10x + 35 = 23 .
  • Combine like terms: 36x+35=23 -36x + 35 = 23 .

Now, isolate the x x term:

  • Subtract 35 from both sides: 36x=2335 -36x = 23 - 35 .
  • Simplify the constants: 36x=12 -36x = -12 .

Finally, solve for x x by dividing both sides by 36-36:

  • x=1236 x = \frac{-12}{-36} .
  • Which simplifies to: x=13 x = \frac{1}{3} .

Therefore, the solution to the problem is x=13 x = \frac{1}{3} .

3

Final Answer

13 \frac{1}{3}

Key Points to Remember

Essential concepts to master this topic
  • Simplification: Combine like terms on both sides before isolating variables
  • Technique: Move all x-terms to one side: -26x - 10x = -36x
  • Check: Substitute x=13 x = \frac{1}{3} back: both sides equal 713 \frac{71}{3}

Common Mistakes

Avoid these frequent errors
  • Moving terms without changing signs
    Don't move -4x to the right side as -4x = wrong equation! When moving terms across the equals sign, you must change their signs. Always change -4x to +4x when moving it to the other side.

Practice Quiz

Test your knowledge with interactive questions

Solve the equation

\( 5x-15=30 \)

FAQ

Everything you need to know about this question

Why do I need to combine like terms first?

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Combining like terms simplifies the equation and makes it easier to solve! For example, -22x - 4x becomes -26x, which is much cleaner than working with separate terms.

How do I remember which direction to move terms?

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Think "opposite operation"! If a term is being added, subtract it from both sides. If it's being subtracted, add it to both sides. The goal is to isolate the variable.

What if I get a negative coefficient for x like -36x?

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No problem! Just divide both sides by the negative number. Remember: 1236=1236=13 \frac{-12}{-36} = \frac{12}{36} = \frac{1}{3} . Two negatives make a positive!

Can I solve this equation in a different order?

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Yes! You could move variables first, then constants. But combining like terms first usually makes the problem easier and reduces chances for arithmetic errors.

How do I check my fractional answer?

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  • Substitute x=13 x = \frac{1}{3} into the original equation
  • Calculate each side carefully
  • Both sides should equal 713 \frac{71}{3} or approximately 23.67

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