The equation i read as being

Linear differential equation needs to be in the form

So divide through by x+1 to get dy/dx on its own.

The integrating factor is in the form

So integrating factor will be

From this you need to multiply the differential equation in linear form by I(x)

ie

From here I get a little lost myself, I'm learning these also, so I'll leave it here so that maybe someone can clarify the rest.