Theorem deceq1i

Description: Equality theorem for the decimal constructor. (Contributed by Mario Carneiro, 17-Apr-2015)

	Ref	Expression
Hypothesis	deceq1i.1	|- A = B
Assertion	deceq1i	|- ; A C = ; B C

Proof

Step	Hyp	Ref	Expression
1		deceq1i.1	|- A = B
2		deceq1	|- ( A = B -> ; A C = ; B C )
3	1 2	ax-mp	|- ; A C = ; B C