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Theorem 6p4e10OLD 11171
Description: 6 + 4 = 10. (Contributed by NM, 5-Feb-2007.) Obsolete version of 6p4e10 11598 as of 8-Sep-2021. (New usage is discouraged.) (Proof modification is discouraged.)
Assertion
Ref Expression
6p4e10OLD (6 + 4) = 10

Proof of Theorem 6p4e10OLD
StepHypRef Expression
1 df-4 11081 . . . 4 4 = (3 + 1)
21oveq2i 6661 . . 3 (6 + 4) = (6 + (3 + 1))
3 6cn 11102 . . . 4 6 ∈ ℂ
4 3cn 11095 . . . 4 3 ∈ ℂ
5 ax-1cn 9994 . . . 4 1 ∈ ℂ
63, 4, 5addassi 10048 . . 3 ((6 + 3) + 1) = (6 + (3 + 1))
72, 6eqtr4i 2647 . 2 (6 + 4) = ((6 + 3) + 1)
8 df-10OLD 11087 . . 3 10 = (9 + 1)
9 6p3e9 11170 . . . 4 (6 + 3) = 9
109oveq1i 6660 . . 3 ((6 + 3) + 1) = (9 + 1)
118, 10eqtr4i 2647 . 2 10 = ((6 + 3) + 1)
127, 11eqtr4i 2647 1 (6 + 4) = 10
Colors of variables: wff setvar class
Syntax hints:   = wceq 1483  (class class class)co 6650  1c1 9937   + caddc 9939  3c3 11071  4c4 11072  6c6 11074  9c9 11077  10c10 11078
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-addass 10001  ax-i2m1 10004  ax-1ne0 10005  ax-rrecex 10008  ax-cnre 10009
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-br 4654  df-iota 5851  df-fv 5896  df-ov 6653  df-2 11079  df-3 11080  df-4 11081  df-5 11082  df-6 11083  df-7 11084  df-8 11085  df-9 11086  df-10OLD 11087
This theorem is referenced by:  6p4e10bOLD  11599  6p5e11OLD  11601  6t5e30OLD  11645
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