dinero = x
gaste chocolates 3x/5
mequeda x -3x/5 =(5x -3x)/5 = 2x/5
gasto 2/5* 2x/5 = 4x/25
x = 3x/5 +4x/25 +300
x -3x/5 - 4x/25 =300 el mcm de 5 y 25 = 25
(25x-15x -4x)/25 =300
6x =300*25
x =7500/6
x = 1250
tenia 1250 dolares
comprobacion
1250 = 3(1250)/5 +4*1250/25 +300
1250= 750 +200+300
1250 = 1250