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Question

Solve for x: 3x4(x1)3=(x2)2.

A
9
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B
14
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C
16
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D
11
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Solution

The correct option is C 16
Given, 3x4(x1)3=(x2)2
L.C.M. of denominator =12
Multiplying each term by 12, we get
12×3x412×(x1)3=12×(x2)2
9x4(x1)=6(x2)
9x4x+4=6x12
5x+4=6x12
x=16
Hence, required value of x is 16.

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