Răspuns:
Explicație pas cu pas:
(6x+4x3)/(x+3)=5 (6x+12)=5(x+3) 6x+12=5x+15 x=3
[tex]\it \left.\begin{aligned}\it m_{a.p}=\dfrac{6\cdot x+4\cdot3}{x+3}\\ \\ \it m_{a.p}=5\end{aligned}\right\} \Rightarrow \dfrac{6x+12}{x+3}=5 \Rightarrow 6x+12=5x+15 \Rightarrow \\ \\ \\ \Rightarrow 6x-5x=15-12 \Rightarrow x=3[/tex]