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Question

Solve for x:
3x+12x1=5x21

A
9
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B
10
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C
12
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D
8
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Solution

The correct option is B 10
3x+12x1=5x21
3(x1)2(x+1)(x+1)(x1)=5x21
3x32x2x21=5x21
As x±1
x5=5
x=10

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