Question

5-2x=-4x-7 ???????????????????????

Answer 1

+2x on both sides
5=-2x-7
+7
12=-2x
/-2
-6=x

Answer 2

My goodness !  What are you going to do when you
really need a question mark and you don't have any
because you used them all up ?

You said                                5 - 2x  =  -4x - 7

Add  4x  to each side:           5 + 2x  =        -7

Subtract  5  from each side:       2x  =       -12

Divide each side by  2 :               x  =         -6