Respuesta:
5
Explicación paso a paso:
Recta: ABCD
Se sabe que: AB + CD = 10 ......(1)
2AC + BD = 5BC + AB
2(AB + BC) + BC + CD = 5BC + AB
2AB + 2BC + BC + CD = 5BC + AB
2AB + 3BC + CD = 5BC + AB
CD = 2BC - AB ......(2)
reemplazando (2) en (1):
AB + 2BC - AB = 10
2BC = 10
BC = 5
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Respuesta:
5
Explicación paso a paso:
Recta: ABCD
Se sabe que: AB + CD = 10 ......(1)
2AC + BD = 5BC + AB
2(AB + BC) + BC + CD = 5BC + AB
2AB + 2BC + BC + CD = 5BC + AB
2AB + 3BC + CD = 5BC + AB
CD = 2BC - AB ......(2)
reemplazando (2) en (1):
AB + 2BC - AB = 10
2BC = 10
BC = 5