Mand n are both integers. select all the statements that are true if m and n are also equal to each other.
m - n = n - m
0 = m - n
m + (-n) = m - n
m + n = 0

m - n = n - m (Both m and n are equal, so their difference will be 0. You can write either way)

0 = m - n  ( As I said , their difference will be 0.)

m + (-n) = m - n   ( + and - product will be -)

All three are true.

The answers are 20,30,80,180,960,890,1230,4560. on the first row