Answer:
[tex]x = ( - 2)[/tex]
Step-by-step explanation:
[tex]6x + 15 = 3(x + 3) \\ 6x + 15 = 3x + 9 \\ 6x - 3x = - 15 + 9 \\ 3x = - 6 \\ \frac{3x}{3} = \frac{ - 6}{3} \\ x = - 2[/tex]
