document.write( "Question 534728: Will you help me with substitution 3x+y=24 y=3x \n" ); document.write( "
Algebra.Com's Answer #351687 by Iluvidina(15)![]() ![]() You can put this solution on YOUR website! Y=12; x=4\r \n" ); document.write( "\n" ); document.write( "I started with y=3x, because it is the easiest to figure out what one of the variables equals \n" ); document.write( "I divided each side by 3. The equation then was 1/3y=x \n" ); document.write( "Then, I substituted that in the other equation for x \n" ); document.write( "The equation 3x+y=24 became 3(1/3y)+y=24 \n" ); document.write( "Then you multiply 3 by 1/3y, becoming (1)y+y=24 \n" ); document.write( "y+y becomes 2y, so the equatiion becomes 2y=24 \n" ); document.write( "Then you divide each side by 2, becoming y=12 \n" ); document.write( "Then you substitute y for 12 in the equation y=3x. So, it would be 12=3x. \n" ); document.write( "Then you divide 3 on both sides, becoming x=4 \n" ); document.write( " |