Реши уравнение.
2z + 5 = 9; z =
5 + 6x = −13; x =
8 − 7y = −34; y =
3x − 7 = 8; x =
7u − 6 = 22; u =
9t + 2 = −25; t =
2z + 5 = 9; z =
5 + 6x = −13; x =
8 − 7y = −34; y =
3x − 7 = 8; x =
7u − 6 = 22; u =
9t + 2 = −25; t =
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