975. Являются ли равносильными неравенства:
1) х -8 и х+3 > - 5; 2) у < 10 и у – 1 < 9;
3) x > 5 и 5x > 25;
4) x < 3 и -3x > –9;


5) x < 20 и 1/2
х+3 > 10;
6) y > -16 и -1/4
у < 4?​
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