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Question

If a=2x312,b=x47,c=x28 and a+b=c+334, find x.

A
121331
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B
141331
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C
23931
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D
231331
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Solution

The correct option is C 231331
2x312+x47=x28+154
=>14x21+12x4884=x2+308
=>14x21+12x4821=x2+302
=>28x42+24x96=21x42+630
=>28x+24x21x=42+630+96+42
=>31x=726
=>x=72631
=>x=231331

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