Ответы на вопрос:
2x = 13 + 15 2x = 28 x = 28/2 x = 14 7y = 45 + 25 7y = 70 y = 70/7 y = 10 - 4x = 70 - 130 - 4x = - 60 4x = 60 x = 60/4 x = 15
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