1) 504 ÷ b - 18 = 72
504 ÷ b = 72 + 18
504 ÷ b = 90
b = 504 ÷ 90
b = 5,6.
Ответ : b = 5,6.
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2) k - 2 ÷ 17 = 8
k - 2/17 = 8
k = 8 + 2/17
k = 8 2/17.
Ответ : k = 8 2/17.
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Удачи)))))
а) 0.5,0.25,0.2,0.05,0.04,0.02
б)0.75,0.4,0.15,0.08,0.06
в)2.5,3.25,1.35,4.16
г)1.5,2.75,3.15,2.04
Ответ:
33 2/13
Пошаговое объяснение:
(32-м)*(-39)=45
32-м=45/-(39)
32-м=-45/39=-1 2/13
м=32+1 2/13
м=33 2/13
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проверка:
(32-33 2/13)*(-39)=45
1)32-33 2/13=-(33 2/13-32)=-1 2/13=
=-(1*13+2)/13=-15/13
2)(-15/13)*(-39)=(-1)*(-1)*(15*39)/13=
=(15*13*3)/13=15*3=45 —›верно