Question

Aflati numerele naturale x, daca 2x - 1 <7

Answer 1

2x-1<7
2x<8
x<4
x = { 3, 2, 1 , 0}

Answer 2

$2x - 1 < 7$

$2x < 7 + 1$

$2x < 8 \: | \div 2$

$x < 4$

$x \: \in \: ( - \infty ,4)$

$x \: \in \: \mathbb{N} = > x \: \in \: \left \{ 0,1,2,3 \right \}$