Răspuns: x = 9
Explicație pas cu pas:
[tex]6 \times (3x + 4) + 15 = 201 \\ x \in \mathbb{N} \\ 6 \times (3x + 4) = 201 - 15 \\ 6 \times (3x + 4) = 186 \\ 3x + 4 = 186 \div 6 \\ 3x + 4 = 31 \\ 3x = 31 - 4 \\ 3x = 27 \\ x = 27 \div 3 \\ \boxed{x = 9 = > x \in \mathbb{N}}[/tex]
sau
[tex]6 \times (3x + 4) + 15 = 201 \\ x \in \mathbb{N} \\ 18x + 24 + 15 = 201 \\ 18x + 24 = 201 - 15 \\ 18x + 24 = 186 \\ 18x = 186 - 24 \\ 18x = 162 \\ x = 162 \div 18 \\ \boxed{x = 9 = > x \in \mathbb{N}}[/tex]
