Answer:
w = 0
Step-by-step explanation:
[tex]w+4w=0\\\\\mathrm{Add\:similar\:elements:}\:w+4w=5w\\\\5w=0\\\\\mathrm{Divide\:both\:sides\:by\:}5\\\\\frac{5w}{5}=\frac{0}{5}\\\\Simplify\\\\w=0[/tex]