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Step * 1 2 of Lemma two-mul


1. x : ℤ
⊢ x + x ~ (1 + 1) * x
BY
{ (RWW "mul-distributes-right one-mul" 0 THENA Trivial) }

1
1. x : ℤ
⊢ x + x ~ x + x

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Latex:

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Latex:

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


By

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

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