let S1, S2 be sequence of RNS; :: thesis: ( ( for n being Element of NAT holds S1 . n = (S . n) - x ) & ( for n being Element of NAT holds S2 . n = (S . n) - x ) implies S1 = S2 )
assume that
A1: for n being Element of NAT holds S1 . n = (S . n) - x and
A2: for n being Element of NAT holds S2 . n = (S . n) - x ; :: thesis: S1 = S2
for n being Element of NAT holds S1 . n = S2 . n

proof

let n be Element of NAT ; :: thesis: S1 . n = S2 . n
S1 . n = (S . n) - x by A1;
hence S1 . n = S2 . n by A2; :: thesis: verum

end;

hence S1 = S2 by FUNCT_2:63; :: thesis: verum