If you add 7 to a number and it equals 20, what is that number?

If you add 7 to a number and it equals 20, what is that number?

• A. 13
• B. 10
• C. 15
• D. 12

Answer: (A)

To find the unknown number, you can set up a simple equation based on the information given. The statement "If you add 7 to a number and it equals 20" can be represented as: x + 7 = 20 Here, x represents the unknown number. To solve for x, you need to isolate it by subtracting 7 from both sides of the equation: x + 7 - 7 = 20 - 7 x = 13 Thus, the number you are looking for is 13. This is why the answer you selected is correct—it directly follows from the mathematical operation performed to solve the equation.

To find the unknown number, you can set up a simple equation based on the information given. The statement "If you add 7 to a number and it equals 20" can be represented as:

x + 7 = 20

Here, x represents the unknown number. To solve for x, you need to isolate it by subtracting 7 from both sides of the equation:

x + 7 - 7 = 20 - 7

x = 13

Thus, the number you are looking for is 13. This is why the answer you selected is correct—it directly follows from the mathematical operation performed to solve the equation.