ДОПОМОЖІТЬ БУДЬЛАСКА!

1) 4-(x-7)+2x = 8;
2)-(4-2) = 10 + 2z
3) (5a-7)+3a-9;
4) 3y + 2 (y-8) = 4;
5) 6 (3-c) +2c=9-c;
6) 7 (d-2)-6-2d +5;​
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