Question

Valorile reale ale lui x pt care 1mai mic sau egal2x+1/5 <3

Answer 1

$1 \leq \frac{2x + 1}{5} < 3 \: | \times 5$

$5 \leq2x + 1 < 15 \: | - 1$

$4 \leq2x < 14 \: | \div 2$

$2 \leq \: x < 7$

$x \: \in \: [2,7)$