document.write( "Question 1144730: The sum of 3 numbers is 30. The sum of the first and second is twice the third. The sun of the second and third is 3 more than twice the first. What is the third number? \n" ); document.write( "
Algebra.Com's Answer #765906 by josgarithmetic(39617)![]() ![]() ![]() You can put this solution on YOUR website! first x \n" ); document.write( "second y \n" ); document.write( "third z \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "First two equations \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "The third number found.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(Better to continue solve for x and y and check if solution for x,y,z work in the system, and in last equation of original description) \n" ); document.write( " |