What is the answer to -4x 8?

As you have written it '' - 4x 8 ' it means nothing.

However, if you mean ' -4x = 8 ' . (Note the 'equals(=)' sign.

Then Dividie both sides by '-4'

Hence

-4x/-4 = 8/-4

Cancel down by '-4'

x = -2 ( Note it is 'minus(-) 2'. NOT (+)2.