For a non-zero integer x,

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Question:
For a non-zero integer x, x7 ÷ x12 is equal to:

(a) x5

(b) x19

(c) x-5

(d) x-19

Solution:

Explanation: x7 ÷ x12 = x7-12 = x-5

(By the law of exponents: am ÷ an=am-n)