# Question #2518b

$\left(- 3 x - + 7\right) + \left(- 6 x + 9\right)$
$- 3 x - 7 - 6 x + 9$ (whenever a $+ , -$come together in an algebraic eqn, $-$ would dominate over $+$)
$\implies - 9 x + 2$ (getting the like terms together)