Please help! Will give brainiest who ever answers first and correct.

letter I'm pretty sure

if it's unknown, it could any number, when the unknown is replaced with a letter, you can solve the test of the equation to find the unknown

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.