Упростите выражение:
1) 3 (x+5) + 4х ;
2)8 (7+х) - 3х ;
3) 9 (х-7) + 6х ;
4) 5 (х+ 8)- 11 ;
5) 2 (18 + х) - 15;
6) 6 (х+ 5) + 2х ;
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