a - b = 149
a : ( b : 2) = 16 rest 9
a = 16 × b : 2 + 9
a = 8 × b + 9
8 × b + 9 - b = 149
7 × b = 149 - 9
7 × b = 140 | : 7
b = 20 (al doilea numar)
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a = 149 + 20
a = 169 (primul numar)
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Verificare:
169 - 20 = 149
169 : ( 20 : 2) = 169 : 10 = 16 rest 9