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If the sum of two numbers is 20 and one number is 12, what is the other number?

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Question: If the sum of two numbers is 20 and one number is 12, what is the other number?

Options:

  1. 8
  2. 7
  3. 6
  4. 5

Correct Answer: 8

Solution: 

Let the other number be x. Then, x + 12 = 20. So, x = 20 - 12 = 8.

If the sum of two numbers is 20 and one number is 12, what is the other number?

Practice Questions

Q1
If the sum of two numbers is 20 and one number is 12, what is the other number?
  1. 8
  2. 7
  3. 6
  4. 5

Questions & Step-by-Step Solutions

If the sum of two numbers is 20 and one number is 12, what is the other number?
  • Step 1: Identify the two numbers. We know one number is 12.
  • Step 2: Let the other number be represented by 'x'.
  • Step 3: Write the equation for the sum of the two numbers: x + 12 = 20.
  • Step 4: To find 'x', subtract 12 from both sides of the equation: x = 20 - 12.
  • Step 5: Calculate the result: 20 - 12 equals 8.
  • Step 6: Therefore, the other number is 8.
  • Algebraic Manipulation – The ability to set up and solve simple equations based on given information.
  • Understanding of Sum – Recognizing how to use the concept of addition to find missing values.
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