Решите уравнения (834-836). 834. 1) 9 х - 2 х – 8 = 5 x ;
3) 2x + 3 |x| — 18 = х - 7 |x| = 15.
2) 7 |x| - 2 |x| = 3 |x| +12;
4) 4х + 5х – 3 = 2х + 11.​
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