Question

3+x <1;x={,..............,................}
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9​

Answer 1

Răspuns:

x=3<1.......................

x=3+1 =4 => 3<4

Answer 2

Explicație pas cu pas:

$- 1 < \frac{3 + x}{9} < 1 | \times 9$

$- 9 < 3 + x < 9 | - 3$

$- 12 < x < 7$

$din \: asta \: rezulta$

x= (-12, 7)