sierram298
08.12.2021 •
Mathematics
X = 7 – 3y
2(7 – 3y) + 4y = 8
14 – 6y + 4y = 8
14 – 2y = 8
–2y = –6
y = 3
x + 3(3) = 7
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Ответ:
7.9m * 8.6m = 67.94.
C.