Решите уравнения
1) 7x - (3 + 2x) = x + 9
2) 13 - (2x - 5) = x - 3
3) 3x - (10 - 9x) = 22x
4) 26 - (17 - 2x) = 5x
СРОЧНО!!! Дам 15 баллов
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