Respuesta:
240
Explicación paso a paso:
elsa=E
bob=B
B+E=500
B/3+E/5=132
5B+3E/15=132
5B+3E=1980
2B+3B+3E=1980
2B+3(B+E)=1980
2B+3(500)=1980
2B+1500=1980
2B=480
B=240
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Respuesta:
240
Explicación paso a paso:
elsa=E
bob=B
B+E=500
B/3+E/5=132
5B+3E/15=132
5B+3E=1980
2B+3B+3E=1980
2B+3(B+E)=1980
2B+3(500)=1980
2B+1500=1980
2B=480
B=240