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g100num [7]
3 years ago
10

Which of the following phrases could represent the expression k - 4?

Mathematics
1 answer:
77julia77 [94]3 years ago
5 0

Answer:

a number decreased by four

Step-by-step explanation:

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Luis ha regalado la mitad de los DVD que tenía a Juan. Después,le ha dado la tercera parte de los que le quedaban a su hermana.
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Answer:

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Step-by-step explanation:

si procedemos desde el final del problema , sabemos que :

total que le quedaba después de darle los CDs a Juan - lo que fue para la hermana = lo que le sobró

x  -  x/3  = 6

2/3*x = 6

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por lo tanto tenia x=9 DVDs después de entregarle a Juan los suyos

también sabemos que

DVDs que tenia al principio - lo que fue para Juan = 9 DVDs

y - y/2 = 9

y/2 = 9

y= 18

finalmente había y= 18 DVDs al principio

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