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Решить уравнение:

1) |х| = 7;

2) |х+2| = 3;

6) |х-1=-5;

7) 21х1-5=0;

3) |х-31=0;

278) 5|х|+1=0; 201

4) |х+4|= -3;

5) |х|+3=9;

9) |5х+31-3=0; 10) |3x-21+5=7.​
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