Ответ:
5x+3x-x = 7x
2-x-x-x = 2-3x
7x-(2-3x) = 7x-2+3x = 10x-2
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Ответ:
5x+3x-x = 7x
2-x-x-x = 2-3x
7x-(2-3x) = 7x-2+3x = 10x-2