Answer:
$33
Step-by-step explanation:
If each locker costs $6, 33x6=330 (the 33 is from 27+6)
They are both not right angles. You can easily tell because you can't draw a square in the corner.
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[ Answer ]

[ Explanation ]
Combine Like Terms (Simplify): -5x - 3x + 7x
====================
Add Similar Elements: -5x - 3x + 7x = -x
Simplify:
-x
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