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x + x+1 + x+2 = 24
3x + 3 = 24
3x = 21
x = 7 los números son 7 , 8 y 9
sea x el número buscado
x + x/2 = 30
2x + x = 60
3x = 60
x = 20 el número es 20
sea x el número
x/25 + 600 = 1000
x/25 = 400
x = 10000
el número es 10000