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София152
@София152
August 2022
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Помогите пожалуйста 55 балов
1.Выполните действие : а)-5/7*(-1 3/4)
б)-4,7-(-8,5)
в) (3/8-7/12)*3,6
2.Решите уравнение 3х-3,4=-10,2-2х
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vladkondratev20
1. А) -5/7•(-1 3/4)=-5/7•(-7/4)=5/4;
Б) -4,7-(-8,5)=-4,7+8,5=3,8;
В) (3/8-7/12)•3,6=-5/24•36/10=-1/2•3/2=-3/4;
2. 3х-3,4=-10,2-2х;
3х+2х=-10,2+3,4;
5х=-6,8;
х=-6,8:5;
х=-1,36.
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Answers & Comments
Б) -4,7-(-8,5)=-4,7+8,5=3,8;
В) (3/8-7/12)•3,6=-5/24•36/10=-1/2•3/2=-3/4;
2. 3х-3,4=-10,2-2х;
3х+2х=-10,2+3,4;
5х=-6,8;
х=-6,8:5;
х=-1,36.