Verified Answer :

m in (-oo:+oo)

m+11 = (1/4)m-(2m) // - (1/4)m-(2m)

m-((1/4)m)+2m+11 = 0

m+(-1/4)m+2m+11 = 0

11/4m+11 = 0 // - 11

11/4m = -11 // : 11/4

m = -11/11/4

m = -4

m = -4

First subtract m over to 11=1/4m-2m-m then factor out an m so 11= m(1/4-2-1) so 11=m(-11/4) then divide over m=-4