document.write( "Question 568158: Solve using the addition principle.
\n" ); document.write( "-18 = m - 30
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Algebra.Com's Answer #366854 by jim_thompson5910(35256)\"\" \"About 
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-18 = m - 30\r
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\n" ); document.write( "\n" ); document.write( "-18 + 30 = m - 30 + 30\r
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\n" ); document.write( "\n" ); document.write( "12 = m\r
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\n" ); document.write( "\n" ); document.write( "m = 12\r
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\n" ); document.write( "\n" ); document.write( "So the solution is m = 12
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