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If 9x + 4 = 31, what is x?

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Question: If 9x + 4 = 31, what is x?

Options:

  1. x = 2
  2. x = 3
  3. x = 4
  4. x = 5

Correct Answer: x = 3

Solution: 

Step 1: Subtract 4 from both sides: 9x = 27. Step 2: Divide both sides by 9: x = 3.

If 9x + 4 = 31, what is x?

Practice Questions

Q1
If 9x + 4 = 31, what is x?
  1. x = 2
  2. x = 3
  3. x = 4
  4. x = 5

Questions & Step-by-Step Solutions

If 9x + 4 = 31, what is x?
  • Step 1: Start with the equation 9x + 4 = 31.
  • Step 2: To get rid of the +4, subtract 4 from both sides of the equation. This gives you 9x = 31 - 4.
  • Step 3: Calculate 31 - 4, which equals 27. Now the equation is 9x = 27.
  • Step 4: To find x, divide both sides of the equation by 9. This gives you x = 27 / 9.
  • Step 5: Calculate 27 divided by 9, which equals 3. So, x = 3.
  • Algebraic Manipulation – The process of rearranging equations to isolate the variable.
  • Solving Linear Equations – Finding the value of the variable that satisfies the equation.
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