Question

Решите двойное неравенство -2<1-3x<2

Answer 1

-2 < 1-3x < 2
-2-1 < -3x < 2-1
-3 < -3x < 1
1 > x > -1/3
-1/3 < x < 1

Answer 2

-2 < 1-3x < 2
-2-1 < -3x < 2-1
-3 < -3x < 1
1 > x > -1/3
-1/3 < x < 1