document.write( "Question 1020885: The numbers in each of the three brackets
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\n" ); document.write( "\n" ); document.write( "[19, 25, 3] [4, 26, 11] [?, 51, 9]\r
\n" ); document.write( "\n" ); document.write( "A 20
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\n" ); document.write( "C 33
\n" ); document.write( "D 34\r
\n" ); document.write( "\n" ); document.write( "I cannot find any common rule?
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Algebra.Com's Answer #636696 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
[\"19\", \"25\", \"3\"]-> common rule:\"%2825-19%29%2F2=6%2F2=3\"
\n" ); document.write( "[\"4\", \"26\", \"11\"] ->\"%2826-4%29%2F2=22%2F2=11\"
\n" ); document.write( "[\"x\", \"51\", \"9\"]->\"%2851-x%29%2F2=9\"->\"51-x=18\"->\"51-18=x\"->\"x=33\"\r
\n" ); document.write( "\n" ); document.write( "[\"33\", \"51\", \"9\"]\r
\n" ); document.write( "\n" ); document.write( "so, answer is:
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