Respuesta:
Explicación paso a paso:
Carmen: x
Ana: 2x
Berenice: 2x-10
x +2x+2x-10=140
5x - 10 = 140
5x = 140 + 10
5x = 150
x = 150/5
x = 30
Reemplazando:
Carmen: x=30
Ana: 2x=2(30)=60
Berenice: 2x-10=2(30)-10=50
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Respuesta:
Carmen: S/30
Ana: S/60
Berenice: S/50
Explicación paso a paso:
Carmen: x
Ana: 2x
Berenice: 2x-10
x +2x+2x-10=140
5x - 10 = 140
5x = 140 + 10
5x = 150
x = 150/5
x = 30
Reemplazando:
Carmen: x=30
Ana: 2x=2(30)=60
Berenice: 2x-10=2(30)-10=50