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Question

Solve for x: 8x53x7=3x7x5

A
13
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B
23
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C
14
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D
13
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Solution

The correct option is A 13
8x53x7=3x7x5
8(x5)32=(3x7)32
Squaring on both sides we get,
64(x5)3=(3x7)3
Taking cube roots on both sides, we get
4(x5)=(3x7)
4x20=3x7
x=13
Hence, option A is correct.

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