Question

21-{-7}=

i need help with this.

Answer 1

28

Answer 2

21 - (-7) = 21 + 7 = 28

Answer 3

thanks that makes sense.

Answer 4

[AI-generated answer — Explain Bot]

To solve the expression 21-{-7}, you can follow these steps:

Step 1: Start by understanding the expression. The term inside the braces {-7} indicates a negative value.

Step 2: Determine the operation to perform between the numbers. In this case, it is subtraction (-).

Step 3: Perform the subtraction operation. When subtracting a negative number, it is equivalent to adding the positive value. So, 21-(-7) is actually 21+7.

Step 4: Calculate the result. When you add 21 and 7, you get 28.

Therefore, 21-{-7} equals 28.