Solve for X in 36x-52+8x=19x+54-31: Linear Equation Practice

Linear Equations with Multi-Step Simplification

Solve for X:

36x52+8x=19x+5431 36x-52+8x=19x+54-31

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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 terms
00:17 Arrange the equation so that only the unknown X is on one side
01:05 Isolate X
01:22 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:

36x52+8x=19x+5431 36x-52+8x=19x+54-31

2

Step-by-step solution

To solve this equation, we'll proceed as follows:

  • Step 1: Simplify both sides of the equation by combining like terms.
  • Step 2: Move all terms with x x to one side of the equation.
  • Step 3: Isolate the variable x x and solve for it.

Now, let's follow these steps in detail:

Step 1: Simplify each side of the equation by combining like terms.

Left side: 36x52+8x 36x - 52 + 8x simplifies to (36x+8x)52=44x52 (36x + 8x) - 52 = 44x - 52 .

Right side: 19x+5431 19x + 54 - 31 simplifies to 19x+(5431)=19x+23 19x + (54 - 31) = 19x + 23 .

Thus, the equation becomes:

44x52=19x+23 44x - 52 = 19x + 23

Step 2: Move all x x terms to one side.

Subtract 19x 19x from both sides:

44x19x52=23 44x - 19x - 52 = 23

This simplifies to:

25x52=23 25x - 52 = 23

Step 3: Isolate the variable x x .

Add 52 to both sides:

25x=23+52 25x = 23 + 52

This gives 25x=75 25x = 75 .

Finally, divide both sides by 25:

x=7525 x = \frac{75}{25}

Thus, x=3 x = 3 .

Therefore, the solution to the problem is x=3 x = 3 , which corresponds to choice 2.

3

Final Answer

3 3

Key Points to Remember

Essential concepts to master this topic
  • Combine Like Terms: Group x terms and constants separately on each side
  • Technique: 36x + 8x = 44x and 54 - 31 = 23
  • Check: Substitute x = 3: 44(3) - 52 = 80 and 19(3) + 23 = 80 ✓

Common Mistakes

Avoid these frequent errors
  • Not combining like terms before moving variables
    Don't try to move variables before simplifying = messy equations with more chances for errors! This creates unnecessary steps and confusion. Always combine like terms on each side first, then move all x terms to one side.

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

Do I have to combine like terms first, or can I move variables immediately?

+

Always combine like terms first! It makes the equation much simpler. For example, 36x+8x 36x + 8x becomes 44x 44x , which is easier to work with than keeping them separate.

What if I get confused about which terms to combine?

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Look for terms with the same variable (like 36x and 8x) or constant numbers (like 54 and -31). Variables with variables, numbers with numbers!

Why do we subtract 19x from both sides instead of adding?

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We want to get all the x terms on one side. Since we have 44x 44x on the left and 19x 19x on the right, subtracting 19x 19x from both sides moves it to the left: 44x19x=25x 44x - 19x = 25x .

How do I know if I made an arithmetic error?

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Check your work by substituting your answer back into the original equation. If x=3 x = 3 , then 36(3)52+8(3) 36(3) - 52 + 8(3) should equal 19(3)+5431 19(3) + 54 - 31 .

What's the fastest way to solve equations like this?

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Follow the order: 1) Combine like terms, 2) Move variables to one side, 3) Move constants to the other side, 4) Divide to isolate x. This systematic approach prevents mistakes!

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