Question

Determinati numerele naturale de forma ab stiind ca:
2×ab+2×ba=132

Answer 1

2* ab+2*ba=132
2*(ab+ba)=132
ab+ba=132:2
ab+ba=66
10a+b+10b+a=66
11a+11b=66
11*(a+b)=66
a+b=66:11
a+b=6
ab={15,24,33,42,51}