document.write( "Question 691235: angle A has 3 times the measure of its supplement, angle B. What is the degree of angle A? \n" ); document.write( "
Algebra.Com's Answer #426581 by ReadingBoosters(3246)\"\" \"About 
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A = 3B
\n" ); document.write( "A + B = 180 ==> supplementary angles have a sum of 180
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\n" ); document.write( "Substitution
\n" ); document.write( "3B + B = 180
\n" ); document.write( "4B = 180
\n" ); document.write( "\"highlight_green%28B+=+45%29\"
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\n" ); document.write( "A = 3(45) = \"highlight_green%28A=135%29\"
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