Question

45 divde (3×x-3) dau corona și 50 pct ​

Answer 1

$\it 45|(3x-3) \Rightarrow \dfrac{3x-3}{45} =\dfrac{3(x-1)}{45}=\dfrac{x-1}{15}=k\in\mathbb{N} \Rightarrow x\in\{1,\ \ 16,\ \ 31,\ \ 46,\ ...\}$