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Find the value of x if 3x + 5 = 20.

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Question: Find the value of x if 3x + 5 = 20.

Options:

  1. 5
  2. 10
  3. 15
  4. 20

Correct Answer: 5

Solution: 

Subtracting 5 from both sides gives 3x = 15, thus x = 15/3 = 5.

Find the value of x if 3x + 5 = 20.

Practice Questions

Q1
Find the value of x if 3x + 5 = 20.
  1. 5
  2. 10
  3. 15
  4. 20

Questions & Step-by-Step Solutions

Find the value of x if 3x + 5 = 20.
  • Step 1: Start with the equation 3x + 5 = 20.
  • Step 2: To isolate the term with x, subtract 5 from both sides of the equation. This gives you 3x = 20 - 5.
  • Step 3: Calculate the right side: 20 - 5 equals 15. Now the equation is 3x = 15.
  • Step 4: To find x, divide both sides of the equation by 3. This gives you x = 15 / 3.
  • Step 5: Calculate 15 divided by 3, which equals 5. So, x = 5.
  • Linear Equations – The question tests the ability to solve a basic linear equation by isolating the variable.
  • Algebraic Manipulation – It assesses skills in performing operations on both sides of an equation to maintain equality.
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