Question

Solve for x.

1+|2+x|=9

Answer 1

for this question those lines mean you have to simplify everything that is outside of those lines.
9-1 equals 8 which gives us
2+x=8
8-2 equals 6
x=6

Answer 2

x = 6
2 + 6 = 8
8 + 1 = 9

True

hope this helps