Question

5 supra X+2 din 3*X+2 este 10
Urgent!!! COROANA!!

Answer 1

$\displaystyle \frac{5}{x+2} \cdot 3x+2=10 \Rightarrow \frac{5(3x+2)}{x+2} =10 \Rightarrow \frac{15x+10}{x+2} =10 \Leftrightarrow \\ \\ \Leftrightarrow 15x+10=10(x+2) \Rightarrow 15x+10=10x+20 \Leftrightarrow \\ \\ \Leftrightarrow 15x-10x=20-10 \Rightarrow 5x=10 \Rightarrow x= \frac{10}{5} \Rightarrow x=2$