Question

|х -6 |=7
|х + 7|=0
|х+ 13|= -13

Answer 1

1)
|x-6|=7
x-6=7   x=13
x-6=-7  x=-1
2)
|x+7|=0
x+7=0
x=-7
3)|x+13|=-13
x+13=-13 
x=-26