The absolute value bars || means that whatever is in side turns to positive so the first one cannot be true
then next 2 are similar, only the last is different
if we try to solve the last 3 then we will get
-6-2x=8 and -6-2x=8, 2 solutions
5x+10=10 and 5x+10, 2 solutions
-6x+3=0 , only one solution becasue you cannot make 0 neagative
the answer is |-6x+3|=0