Answer:
3
Step-by-step explanation:
(-5) × ? = (-15)
? = (-15)/(-5)
? = 3
(-5) × ? = -15
? = -15 ÷ (-5)
? = 15 ÷ 5
? = (3 × 3 × 3) <= 3 Factor
Value of ? is 3.
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