1. Раскройте скобки и найдите значение выражения
4) (8d - 2y) * (-0,6) при x= 5
5) 0,9(-8 - 3x) при х=4
6) - 1/4(4/5у+9) при у = 3 3/4

2. Упростите скобки
4) (-a)*(-b)*(-c)*(-d)
5) -0,8 * (-3x) * 5y * (-4)
6) -1/3a *(-3/4b) * (-4/5c)
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