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Antonio-->x
x-23+x < 97
x+x < 97+23
2x < 120
x < 120/2
x < 60
Antonio tiene menos de 60 años
Antonio= a
1) m= a-23
2) m+a<97
Reemplazando 1 en 2:
a - 23 + a < 97
2a < 97 +23
a < 120/2
a < 60