What number must be subtracted from 14 to get 12?
12
−14
1
-1
Let the number be x.
14−x=12
x=14−12=−14
What must be subtracted from 3a2−6ab−eb2−1 to get 4a2−7ab−4b2+1?
What must be subtracted from 217 to get 1721?
What must be subtracted from -1 to get -6?