Question

960.
Решите неравенства (960–962).
1) 7 < 2х + 3 <11;
2)-3<1+2х<7 3)-2<8+/7<4 4)-7<2х+1/2<2

Answer 1

1) 7 < 2х + 3 < 11

7-3 < 2x < 11-3

4 < 2x < 8

2 < x < 4

2) -3 < 1+2х < 7

-3-1 < 2x < 7-1

-4 < 2x < 6

-2 < x < 3

3) опечатка в записи

4) -7 < 2х+1/2 < 2

-7-1/2 < 2x < 2-1/2

-6 1/2 < 2x < 1 1/2

-3 1/4 < x < 3/4