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If the expression 3x + 5 = 20 is solved for x, what is the value of x?

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Question: If the expression 3x + 5 = 20 is solved for x, what is the value of x?

Options:

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

Correct Answer: 5

Solution: 

To solve for x, subtract 5 from both sides to get 3x = 15, then divide by 3 to find x = 5.

If the expression 3x + 5 = 20 is solved for x, what is the value of x?

Practice Questions

Q1
If the expression 3x + 5 = 20 is solved for x, what is the value of x?
  1. 5
  2. 10
  3. 15
  4. 20

Questions & Step-by-Step Solutions

If the expression 3x + 5 = 20 is solved for x, what is the value of x?
  • Step 1: Start with the equation 3x + 5 = 20.
  • Step 2: Subtract 5 from both sides of the equation. This gives you 3x = 20 - 5.
  • Step 3: Calculate 20 - 5, which equals 15. Now the equation is 3x = 15.
  • Step 4: Divide both sides of the equation by 3 to isolate x. This gives you x = 15 / 3.
  • Step 5: Calculate 15 divided by 3, which equals 5. So, x = 5.
  • Algebraic Manipulation – The process of rearranging an equation to isolate the variable.
  • Linear Equations – Understanding and solving equations of the form ax + b = c.
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