Question

Tell weather each equation has one, zero, or infinitely many solutions. -(2x + 2) - 1 = -x - (x + 3)

Answer 1

$-(2x+2)-1=-x-(x+3) \\ -2x-2-1=-x-x-3 \\ -2x-3=-2x-3 \\ 0=0 \\ always \ true \\ \\ \boxed{\hbox{infinitely many solutions}}$