document.write( "Question 56389: y=2x-2\r
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document.write( "y=-x+1 \n" );
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Algebra.Com's Answer #38239 by Lacey020991(49)![]() ![]() ![]() You can put this solution on YOUR website! y=2x-2 \n" ); document.write( "y=-x+1 \n" ); document.write( "I'm not sure which way your supposed to solve this, so i will show you all 3. \n" ); document.write( "Graphing: \n" ); document.write( " \n" ); document.write( "So your answer would be (1,0) \n" ); document.write( ". \n" ); document.write( "By elimination, you would need to put theses equations in to standard form \n" ); document.write( "y = 2x - 2 ---- move the 2x to the other side \n" ); document.write( "-2x + y = -2 ---- this next step isnt neccesary, but i like to do it. \n" ); document.write( "2x - y = 2 \n" ); document.write( ". \n" ); document.write( "y = -x + 1 ---- move the x to the other side \n" ); document.write( "x + y = 1 \n" ); document.write( ". \n" ); document.write( "You would now put these equations on top of each other and eliminate 1 variable. In this case, the y's cancel out and you dont have to multiply anything. \n" ); document.write( "2x - y = 2 \n" ); document.write( " x + y = 1 \n" ); document.write( "----------- \n" ); document.write( "3x = 3 \n" ); document.write( "x = 1 \n" ); document.write( "Put this answer back into one of the equations. The second looks easier to me so im going to use that 1. \n" ); document.write( "x + y = 1 \n" ); document.write( "1 + y = 1 \n" ); document.write( "y = 0 \n" ); document.write( "So your answer is (1,0) \n" ); document.write( ". \n" ); document.write( "To solve by substitution, you would take one of the equations and put the second in where the variable is. \n" ); document.write( "y=2x-2 \n" ); document.write( "y=-x+1 \n" ); document.write( "The second equation is y=... so wherever there is a y in the first equation, your going to put the second equation. \n" ); document.write( "y=2x-2 \n" ); document.write( "-x + 1 = 2x - 2 ----then solve for x (isolate it) \n" ); document.write( "1 = 3x - 2 \n" ); document.write( "3 = 3x \n" ); document.write( "1 = x \n" ); document.write( "Then put your answer back into one of the equations. the first looks easier to me, so im going to use that one. \n" ); document.write( "y = 2x - 2 \n" ); document.write( "y = 2(1) - 2 \n" ); document.write( "y = 2 - 2 \n" ); document.write( "y = 0 \n" ); document.write( "So again your answer would be (1,0) \n" ); document.write( ". \n" ); document.write( "Hope this helped!\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |