Respuesta:
Explicación paso a paso:
2x + 3 = 3.19
2x + 3 = 57
2x = 57 - 3
2x = 54
x = 54/2
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Respuesta:
Mary tiene 27 años
Explicación paso a paso:
2x + 3 = 3.19
2x + 3 = 57
2x = 57 - 3
2x = 54
x = 54/2
x = 27