document.write( "Question 120571: how do you find two supplement angles in the ratio of7:5? \n" ); document.write( "
Algebra.Com's Answer #88391 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
I think you meant to say 'supplemental' angles.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Supplemental angles are angles whose measures sum to either 180 degrees or \"pi\", depending on the measurement system you are using. Let's use 180 degrees for this example.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "If the measure of one of the angles is x degrees, then the measure of the other angle must be 180 - x degrees. And we know that these two angles are in the ratio of 7:5. So we can write:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"%28180-x%29%2Fx=7%2F5\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since we have created a proportion, we can cross multiply and solve:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"5%28180-x%29=7x\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"900-5x=7x\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"900=12x\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"x=75\".\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "So 75 degrees is the measure of one of the angles, and the other angle must then be 180 - 75 = 105.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Check the answer:\r
\n" ); document.write( "\n" ); document.write( "Reduce the fraction \"105%2F75\" to lowest terms.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"105%2F75=%2815%2A7%29%2F%2815%2A5%29=7%2F5\", answer checks.
\n" ); document.write( "
\n" );