document.write( "Question 33961: directions:solve problems using two unkowns and a system of two equations.\r
\n" );
document.write( "\n" );
document.write( "the diffrence of two numbers is -1. if twice the first number is added to three times the second number, the result is 13. what are the numbers \n" );
document.write( "
Algebra.Com's Answer #20352 by fanism(39)![]() ![]() ![]() You can put this solution on YOUR website! let the first # be x and the second # be y \n" ); document.write( "x - y = -1 -- eq 1 \n" ); document.write( "2x + 3y = 13 -- eq 2\r \n" ); document.write( "\n" ); document.write( "multifply eq 1 by 2, yields \n" ); document.write( "2x - 2y = -2 -- eq 3\r \n" ); document.write( "\n" ); document.write( "now, take eq2 - eq3, u will get \n" ); document.write( "0 - 5y = 15 \n" ); document.write( "y = -3\r \n" ); document.write( "\n" ); document.write( "sub y = -3 into any of the above equation, \n" ); document.write( "let use eq1, u will get \n" ); document.write( "x - (-3) = -1 \n" ); document.write( "x + 3 = -1 \n" ); document.write( "x = -4 \n" ); document.write( " |