document.write( "Question 218995:
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document.write( "find two supplementary angles such that the measure of the first angle is 60 degrees less than twice the second? \n" );
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Algebra.Com's Answer #164799 by checkley77(12844) ![]() You can put this solution on YOUR website! x+y=180 or x=180-y \n" ); document.write( "x=2y-60 \n" ); document.write( "2y-60=180-y \n" ); document.write( "2y+y=180+60 \n" ); document.write( "3y=240 \n" ); document.write( "y=240/3 \n" ); document.write( "y=80 ans. \n" ); document.write( "x=180-80 \n" ); document.write( "x=100 ans. \n" ); document.write( "Proof: \n" ); document.write( "100=2*80-60 \n" ); document.write( "100=160-60 \n" ); document.write( "100=100 \n" ); document.write( " |