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|x+3|=2
x+3=2 ∨ x+3=-2
x=-1 ∨ x=-5
x∈{-5,-1}
b)
|x-5|=2
x-5=2 ∨ x-5=-2
x=7 ∨ x=3
x∈{3,7}
c)
|x+4|=3
x+4=3 ∨ x+4=-3
x=-1 ∨ x=-7
x∈{-7, -1}
d)
|2x+6|=4
2x+6=4 ∨ 2x+6=-4
2x=-2 ∨ 2x=-10
x=-1 ∨ x=-5
x∈{-5, -1}