Step |
Hyp |
Ref |
Expression |
1 |
|
simprl |
|
2 |
1
|
recnd |
|
3 |
|
simprr |
|
4 |
3
|
recnd |
|
5 |
|
simplr |
|
6 |
5
|
recnd |
|
7 |
|
subadd23 |
|
8 |
7
|
eqcomd |
|
9 |
2 4 6 8
|
syl3anc |
|
10 |
9
|
breq2d |
|
11 |
|
simpll |
|
12 |
|
resubcl |
|
13 |
12
|
ad2ant2l |
|
14 |
11 1 13
|
ltsubadd2d |
|
15 |
|
resubcl |
|
16 |
15
|
adantl |
|
17 |
11 5 16
|
ltsubaddd |
|
18 |
10 14 17
|
3bitr4d |
|