document.write( "Question 345478: ∠A and ∠B are supplementary. Find ∠A and ∠B.\r
\n" ); document.write( "\n" ); document.write( "m∠A=3x-7
\n" ); document.write( "m∠B=11-1
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Algebra.Com's Answer #247072 by Fombitz(32388)\"\" \"About 
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By definition,
\n" ); document.write( "\"A%2BB=180\"
\n" ); document.write( "Substitute,
\n" ); document.write( "\"3x-7%2B11-1=180\"
\n" ); document.write( "\"3x%2B3=180\"
\n" ); document.write( "\"3x=177\"
\n" ); document.write( "\"x=59\"degrees
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\n" ); document.write( "\"A=3%2859%29-7\"
\n" ); document.write( "\"A=170\"degrees
\n" ); document.write( "\"B=10\"degrees
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