Предмет: Математика, автор: grisakovaalina521

номер1280 пжпж срочно надо!! дам 20 баллов!​

Приложения:
nempley111111: Подожди пару минут,щас решу)

Ответы

Автор ответа: nempley111111
0

ввот решение бро или сестра)))))

Приложения:
Khhudiakovv: хорош
Автор ответа: Khhudiakovv
0

Ответ:

x=6    y=-2

Пошаговое объяснение:

21(x-y)=48+20x
19(y+x)=100+12y

21x-21y=48+20x
19y+19x=100+12y

21x-20x=48+21y
x=48+21y

19y+19(48+21y)=100+12y
19y+912+399y=100+12y
406y=-812
y=-2

x=48+21y
x=48+(-42)=6

ответ:  x=6  y=-2

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