Respuesta:
b) Eliana 75 dolares
Explicación paso a paso:
A = E/3
3A = E
A = 5R/4
4A/5 = R
A + E + R = 120
A + 3A + 4A/5 = 120
(5A + 15A + 4A)/5 = 120
24A = 120(5)
24A = 600
A = 600/24
A = 25
E = 3A
E = 3(25)
E = 75
R = 4A/5
R = 4(25)/5
R = 100/5
R = 20
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Respuesta:
b) Eliana 75 dolares
Explicación paso a paso:
A = E/3
3A = E
A = 5R/4
4A/5 = R
A + E + R = 120
A + 3A + 4A/5 = 120
(5A + 15A + 4A)/5 = 120
24A = 120(5)
24A = 600
A = 600/24
A = 25
E = 3A
E = 3(25)
E = 75
R = 4A/5
R = 4(25)/5
R = 100/5
R = 20