388. 1) -20 + (x + 15) = 0; 3) -20 + (15 + x) = 0;
5) 5x + (-100) = 0;
7) 0,6x + (-72,6) = 0;
2) -20 + (x - 15) = 0;
4) -20 + (-x - 15) = 0;
6) -100 + 5x = 0;
8) -51,3 + 0,03x = 0.​
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