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When you move down you subtract and when you move to the right you subtract when your moving up or to the left you add
Answer:
GCF = 4
Step-by-step explanation:
The factors of 8 are: 1, 2, 4, 8
The factors of 12 are: 1, 2, 3, 4, 6, 12
The greatest common factor is 4.
I hope this helps :).
The answer is -16 and -5.
