The absolute value of |-2+5| is 7. All you do is add 5 & 7 and then you don't put it as negative because absolute numbers are always positive.
For example-
-7=7
7=7
-3564=3564
Its always the same exact number except if the number is negative you just change it into a positive number!
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Absolute value of -2+(-5) is 7.
90
Absolute value of -6+5 is 1.
-5
|x + 1| - |x + 4| = 0 ∴ |x + 1| = |x + 4| ∴ x + 1 = -x - 4 ∴ 2x = -5 ∴ x = -5/2