Question

find the missing number so that the equation has infinitely many solutions. -2(-x - 3) = 2x + \square

Explanation:

Step1: Expand left-hand side

$
-2(-x - 3) = (-2)(-x) + (-2)(-3)
$

Step2: Calculate the products

$
(-2)(-x) + (-2)(-3) = 2x + 6
$

Step3: Match for infinite solutions

For the equation $2x + 6 = 2x + \square$ to have infinitely many solutions, the constant terms must be equal.

Answer:

6