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If 3x - 3x-1 = 18, then xx is equal to

Correct Answer: 27

Explanation:

∵ 3x - 3x - 1 = 18
⇒ 3x - 1(3 - 1) = 18
⇒ 3x - 1(2) = 18
⇒ 3x - 1 = 18/2
⇒ 3x - 1 = 9
⇒ 3x - 1 = 32
Apply the Algebra law,
If aX = aY then X will be equal to Y.
means X = Y;
⇒ x - 1 = 2
⇒ x = 3
Then xx = (3)3 = 27


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