Which equation has only one solution?

|x - 5| = - 1

|-6 - 2x| = 8

|5x + 10| = 10

|-6x + 3| = 0

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