The sum of a number and 12 is equal to 20. What is the number?

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Question: The sum of a number and 12 is equal to 20. What is the number?

Options:

Correct Answer: 6

Solution:

Let the number be x. The equation is x + 12 = 20. Subtracting 12 from both sides gives x = 8.

The sum of a number and 12 is equal to 20. What is the number?

The sum of a number and 12 is equal to 20. What is the number?

Step 1: Identify the unknown number. Let's call it 'x'.
Step 2: Write down the equation based on the problem. The sum of the number and 12 is equal to 20, so we write: x + 12 = 20.
Step 3: To find 'x', we need to isolate it. We do this by subtracting 12 from both sides of the equation.
Step 4: After subtracting 12 from both sides, the equation looks like this: x + 12 - 12 = 20 - 12.
Step 5: Simplify both sides. The left side becomes 'x' and the right side becomes '8'. So, we have: x = 8.
Step 6: Therefore, the number is 8.

Algebraic Equations – The question tests the ability to set up and solve a basic linear equation.