Step * 1 2 of Lemma two-mul


1. : ℤ
⊢ (1 1) x
BY
(RWW "mul-distributes-right one-mul" THENA Trivial) }

1
1. : ℤ
⊢ x


Latex:


Latex:

1.  x  :  \mBbbZ{}
\mvdash{}  x  +  x  \msim{}  (1  +  1)  *  x


By


Latex:
(RWW  "mul-distributes-right  one-mul"  0  THENA  Trivial)




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