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JulliaHelp
@JulliaHelp
July 2022
1
7
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Найдите значение выражения: (1 3/4+1,7):1/20
Помогите пожалуйста,срочно надо
Найдите корень уравнения: 1)(4z)/5+2=-2/5
2)0.7z-2.1=-9.8
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Uteshev
(1 3/4+1,7)÷1/20=3,45÷1/20=69
1)4z÷5+2=-2/5
4z÷5=-2/5-2
4z÷5=-2,4
4z=-2,4×5
4z=-12
z=-3
2)0,7z-2,1=-9,8
0,7z=-9,8+2,1
0,7z=-7,7
z=11
2 votes
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Answers & Comments
1)4z÷5+2=-2/5
4z÷5=-2/5-2
4z÷5=-2,4
4z=-2,4×5
4z=-12
z=-3
2)0,7z-2,1=-9,8
0,7z=-9,8+2,1
0,7z=-7,7
z=11