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ab barat=? ; 3×ab+3×ba=165

Răspuns :

3×ab + 3×ba = 165
3(ab+ba) = 165
ab+ba = 165 : 3 = 55
10a+b+10b+a = 55
11a+11b = 55
11(a+b) = 55
a+b = 55 : 11 = 5
a = {1,2,3,4}
b = {4,3,2,1}
ab = {14,23,32,41}