Question

12 Rezolvaţi în z inecuațiile:
a 3x>-80;
b 5x < 1;
c 2xs-3;
d 7x2-10;
e 3x +1> -12;
f 5x-230;
g -5x + 122-2; h 3(2x - 1) sx- 14
EX 12

Answer 1

Explicație pas cu pas:

a

$3x>-80 \\ x > - \frac{80}{3}$

b

$5x < 1 \\ x < \frac{1}{5}$

c

$2x \leqslant - 3 \\ x \leqslant - \frac{3}{2}$

d

$7x \geqslant -10 \\ x \geqslant - \frac{10}{7}$

e

$3x +1> -12 \\ 3x > - 12 - 1 \\ 3x > - 13 \\ x > - \frac{13}{3}$

f

$5x-2 \leqslant 0 \\ 5x \leqslant 2 \\ x \leqslant \frac{2}{5}$

g

$-5x + 12 \geqslant - 2 \\ - 5x \geqslant - 2 - 12 \\ - 5x \geqslant - 14 \\ x \leqslant \frac{14}{5}$

h

$3(2x - 1) \leqslant x- 14 \\ 6x - 3 \leqslant x - 14 \\ 6x - x \leqslant - 14 + 3 \\ 5x \leqslant - 11 \\ x \leqslant - \frac{11}{5}$