document.write( "Question 107259: The first angle of a triangle is 15 degrees more than the second triangle. The third angle of a triangle is three times the second angle. Use x to represent the unknown Value.\r
\n" ); document.write( "\n" ); document.write( "? The first angle
\n" ); document.write( "? the second angle
\n" ); document.write( "? the third angle \n" ); document.write( "
Algebra.Com's Answer #78060 by Annabelle1(69)\"\" \"About 
You can put this solution on YOUR website!
The first angle of a triangle is 15 degrees more than the second triangle. The third angle of a triangle is three times the second angle. Use x to represent the unknown Value\r
\n" ); document.write( "\n" ); document.write( "let the second angle be x
\n" ); document.write( "the first angle is then x+15
\n" ); document.write( "the third angle is 3 times the second so it is 3x\r
\n" ); document.write( "\n" ); document.write( "all these add to 180 degrees (angle sum of triangle)
\n" ); document.write( "x+(x+15)+3x=180
\n" ); document.write( "5x+15=180
\n" ); document.write( "minus 15 from both sides of the equals sign
\n" ); document.write( "5x+15-15=180-15
\n" ); document.write( "5x=165\r
\n" ); document.write( "\n" ); document.write( "divide both sides by 5
\n" ); document.write( "x=165/5
\n" ); document.write( "x=33
\n" ); document.write( "so the second angle is 33
\n" ); document.write( "the first is 33+15=48
\n" ); document.write( "the third is 3 times 33=99 \n" ); document.write( "
\n" );