Question

find the missing number so that the equation has infinitely many solutions. \boxed{}x + 8 = 2(2x + 4)

Explanation:

Step1: Expand the right-hand side

$2(2x + 4) = 4x + 8$

Step2: Match coefficients for infinite solutions

For $\square x + 8 = 4x + 8$ to have infinitely many solutions, the coefficients of $x$ must be equal. So $\square = 4$.

Answer:

4