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Dia de Santiago = B
5A +4B = $10500
5A = 10500 - 4B
A = 2100 - 4B/5
Semana siguiente 3A + 5B = $9500
3 (2100 - 4B/5) + 5B = 9500
6300 -12B/5 + 5B = 9500
5B - 12B/5 = 9500 - 6300
13B/5 = 3200
B = 5 (3200)/13
B = $ 1230.769 jornal diario de Santiago
A=2100 - 4B/5
A = 2100 - 4(1230.769)/5
A= $ 1115.385 jornal diario de Diego