42-(12 12/15+ 18 7/15)

Предыдущий
вопрос Следующий
вопрос

42 - (12 12/15 + 18 7/15)

First, we need to convert the mixed numbers to improper fractions:

12 12/15 = (15 x 12 + 12) / 15 = (180 + 12) / 15 = 192 / 15 = 64/5
18 7/15 = (15 x 18 + 7) / 15 = (270 + 7) / 15 = 277 / 15

Now we can substitute the improper fractions back into the equation:

42 - (64/5 + 277/15)

Now we need to find a common denominator for the fractions, which is 15:

42 - (364/15 + 5277/15)
42 - (192/15 + 1385/15)
42 - (1577/15)

To subtract the fractions, we need to have the same denominator:

42 - (1577 - 630) / 15
42 - 947 / 15

Now, we can subtract the fractions:

42 - (947/15) = (42 * 15 - 947) / 15 = (630 - 947) / 15 = -317 / 15

Therefore, 42 - (12 12/15 + 18 7/15) = -317/15.