Respuesta:
25
Explicación paso a paso:
x - y = 50
x = 3y
3y - y = 50
2y = 50
y = 50/2
y = 25
x = 75
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Respuesta:
25
Explicación paso a paso:
x - y = 50
x = 3y
3y - y = 50
2y = 50
y = 50/2
y = 25
x = 75