Yes you do have "those buttons" (that key) on your keyboard.
Hold the shift key down and press the key that looks like this
. You'll find it just above the ENTER and just below the
Backspace key.
|8x+9| + 3 = 8
Add -3 to both sides
|8x+9| = 5
Since both |5|=5 and |-5|=5 this breaks into two equations:
8x+9 = 5 and 8x+9 = -5
8x = -4 8x = -14
x = x =
x = x =
Those are the two solutiuons.
Edwin