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Question

Solve for x: 9x+25x+3=4x+1;x{1,2,3}.

A
7
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B
9
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C
2
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D
5
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Solution

The correct option is D 7
Given
9x+25x+3=4x+1

9(x+3)5(x+2)(x+3)(x+2)=4x+1

9x+275x10(x+3)(x+2)=4x+1

(4x+17)(x+1)=4(x+3)(x+2)

4x2+17x+4x+17=4x2+12x+8x+24

21x+17=20x+24

x=7

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