Ответ:
5x+y
Объяснение:
7х-(5х - (3x+y) = 7x-(5x-3x-y) = 5x+y
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Ответ:
5x+y
Объяснение:
7х-(5х - (3x+y) = 7x-(5x-3x-y) = 5x+y