Question

responda

b) x - 2x - 3=0​

Answer 1

$\sf x-2x-3=0\\\\\\-x-3=0\\\\\\-x-3+3=0+3\\\\\\-x=3\\\\\\\dfrac{-x}{-1}=\dfrac{3}{-1}\\\\\\\to \boxed{\sf x=-3}$