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Raptor007
@Raptor007
November 2021
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Решите плиззз очень надо,буду очень благодарен!
2/7*(1,4а-3 1/2b)-1,2( 5/6a-0,5b)
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prettypushkova
Verified answer
2/7 * (1,4а - 3 1/2b) - 1,2 * (5/6a - 0,5b) = 0,4a - b - a + 0,6b = (0,4a - a) + (0,6b - b) = - 0,6a - 0,4b = - (0,6a + 0,4b).
Пояснения:
2/7 * 1,4а = (2 * 1,4 : 7)а = 0,4а
2/7 * (- 3 1/2b) = 2/7 * (- 3,5b) = - (2 * 3,5 : 7)b = - 1b = - b
- 1,2 * 5/6a = - (1,2 * 5 : 6)a = - 1a = - a
- 1,2 * (- 0,5b) = 0,6b
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Answers & Comments
Verified answer
2/7 * (1,4а - 3 1/2b) - 1,2 * (5/6a - 0,5b) = 0,4a - b - a + 0,6b = (0,4a - a) + (0,6b - b) = - 0,6a - 0,4b = - (0,6a + 0,4b).Пояснения:
2/7 * 1,4а = (2 * 1,4 : 7)а = 0,4а
2/7 * (- 3 1/2b) = 2/7 * (- 3,5b) = - (2 * 3,5 : 7)b = - 1b = - b
- 1,2 * 5/6a = - (1,2 * 5 : 6)a = - 1a = - a
- 1,2 * (- 0,5b) = 0,6b