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Theorem 7p3e10 9867
Description: 7 + 3 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.)
Assertion
Ref Expression
7p3e10 (7 + 3) = 10

Proof of Theorem 7p3e10
StepHypRef Expression
1 df-3 9373 . . . 4 3 = (2 + 1)
21oveq2i 6099 . . 3 (7 + 3) = (7 + (2 + 1))
3 7cn 9397 . . . 4 7 ∈ ℂ
4 2cn 9384 . . . 4 2 ∈ ℂ
5 ax-1cn 8278 . . . 4 1 ∈ ℂ
63, 4, 5addassi 8340 . . 3 ((7 + 2) + 1) = (7 + (2 + 1))
72, 6eqtr4i 2262 . 2 (7 + 3) = ((7 + 2) + 1)
8 7p2e9 9465 . . 3 (7 + 2) = 9
98oveq1i 6098 . 2 ((7 + 2) + 1) = (9 + 1)
10 9p1e10 9790 . 2 (9 + 1) = 10
117, 9, 103eqtri 2263 1 (7 + 3) = 10
Colors of variables:    wff set class
This proof depends on syntax axioms:   = wceq 1402  (class class class)co 6088  0cc0 8185  1c1 8186   + caddc 8188  2c2 9364  3c3 9365  7c7 9369  9c9 9371  cdc 9788
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-sep 4251  ax-cnex 8276  ax-resscn 8277  ax-1cn 8278  ax-1re 8279  ax-icn 8280  ax-addcl 8281  ax-addrcl 8282  ax-mulcl 8283  ax-mulcom 8286  ax-addass 8287  ax-mulass 8288  ax-distr 8289  ax-1rid 8292  ax-0id 8293  ax-cnre 8296
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4132  df-iota 5340  df-fv 5388  df-ov 6091  df-inn 9314  df-2 9372  df-3 9373  df-4 9374  df-5 9375  df-6 9376  df-7 9377  df-8 9378  df-9 9379  df-dec 9789
This theorem is used by:  7p4e11  9868  1259lem4  13274  log2ublem3  16223  log2ublog2  16224
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