document.write( "Question 677474: three numbers have an average of 15. if two numbers are 10 and 12, what is the other number? \n" ); document.write( "

Algebra.Com's Answer #420915 by ReadingBoosters(3246) $\"\"$ $\"About$

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$\"%2810%2B12%2Bx%29%2F3+=+15\"$
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\n" ); document.write( " $\"22%2Bx%29%2F3=15\"$
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\n" ); document.write( "22+x = 15(3)
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\n" ); document.write( "22 + x = 45
\n" ); document.write( "x = 45-22
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