Description: Cancelling a term on the right-hand side of a sum in an equality. Consequence of addcan2d . (Contributed by David Moews, 28-Feb-2017)
Ref | Expression | ||
---|---|---|---|
Hypotheses | muld.1 | |
|
addcomd.2 | |
||
addcand.3 | |
||
addcan2ad.4 | |
||
Assertion | addcan2ad | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | muld.1 | |
|
2 | addcomd.2 | |
|
3 | addcand.3 | |
|
4 | addcan2ad.4 | |
|
5 | 1 2 3 | addcan2d | |
6 | 4 5 | mpbid | |