Ponommareva , ответ добавлен 17.08.2018 в 18:39

7x + 9x + 32 = 272
16x = 272 - 32
16x = 240
x = 240 : 16
x = 15

5y + 7y - 24 = 204
12y = 204 + 24
12y = 228
y = 228 : 12
y = 19

24y - 15y + 47 = 1919
9y = 1919 - 47
9y = 1872
y = 1872 : 9
y = 208

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