In one book of 12 pages and in the second 24 for how many days it is possible to read both books if daily to read 4 pages solve a problem in two ways

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12: 4=3 times where 12 sheets 24:4=6 of times where 24 lista) 1)12:4=3 (dn) 1 book 2)24:4=6 (dn) the 2nd book 3)3+6=9 (dn) only b) (12+24): 4=9 (dn)
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Answer add