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Anonymous
-4x-4 equals -16.
Add 4 to both sides; -4x equals -12.
Divide both sides by -4; x equals 3.
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8
16
Non-prime squares
1x16, 2x8, 4x4
1x16=16 2x8=16 4x4=16 sorry! all i know!
It's not, 4x4=16.