document.write( "Question 428899: can I have some step by step examples of how to solve linear systems using elimination and graphing it out. Also solving linear systems by multiplying first and graphing. I appreciate any help my daughter has a retest tomorrow and is lost and i am trying to help her,that is why I,myself need a step by step explanation it is for me to understand so i can teach her.\r
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Algebra.Com's Answer #298018 by mananth(16946)![]() ![]() You can put this solution on YOUR website! 2x+3y=8 .............1 \n" ); document.write( "x-5y=17 .............2 \n" ); document.write( " \n" ); document.write( "Eliminate y \n" ); document.write( "multiply (1)by 5 \n" ); document.write( "Multiply (2) by 3 \n" ); document.write( "10x+5y=40 \n" ); document.write( "3x+2y=51 \n" ); document.write( " \n" ); document.write( "Add the two equations \n" ); document.write( " \n" ); document.write( "13x=91 \n" ); document.write( " \n" ); document.write( "/13 \n" ); document.write( " \n" ); document.write( "x=7 \n" ); document.write( " \n" ); document.write( "plug value of x in (1) \n" ); document.write( " \n" ); document.write( "2x+3y=8 \n" ); document.write( "14+3y=8 \n" ); document.write( "3y=8+-14 \n" ); document.write( "3y=-6 \n" ); document.write( "y=-2\r \n" ); document.write( "\n" ); document.write( "(7,-2) is the solution.\r \n" ); document.write( "\n" ); document.write( "2x+3y=8 .............1 \n" ); document.write( "x=0 , y=8/3 ( 0,8/3) \n" ); document.write( "y=0, x=4 (4,0)\r \n" ); document.write( "\n" ); document.write( "x-5y=17 .............2 \n" ); document.write( "x=0,y=-17/5 (0,-17/5) \n" ); document.write( "y=0,x=17 (17,0)\r \n" ); document.write( "\n" ); document.write( "Plot two points generated from each equation (1) & (2) draw the line graph\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The intersection is the solution \n" ); document.write( " |