Предмет: Математика, автор: marinamudrak86

Розв'яжіть рівняння: 1)8•(7а-9)-7•(8а+9)=-135; 2)-18-12х=174+4х: 3)-16-10у=152+4у; 4)14•(5х-2)-5•(14х+2)=-38​

Ответы

Автор ответа: avergw
0

Ответ:

Пошаговое объяснение:

8•(7а-9)-7•(8а+9)=-135    

56a-72-56a-63=-135

-135=-135

корені не має

-18-12х=174+4х

-12х-х=174+18

-16х=192

-х=12

х=-12

-16-10у=152+4у

-10y-4y=152+16

-14y=168

-y=12

y=-12

14•(5х-2)-5•(14х+2)=-38​

70x-28-70-10=-38

-38=-38

коренів не має

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