document.write( "Question 747319: 1. Solve the following system of linear equations using either the substitution method or the addition method:
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document.write( " 2x+y=5
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document.write( " 4x+3y=14\r
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document.write( "Please help me solve this problems and each step in order to understand it.
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document.write( "Thank you in advance. \n" );
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Algebra.Com's Answer #454824 by timvanswearingen(106)![]() ![]() You can put this solution on YOUR website! I prefer to use elimination. Here's how it goes.\r \n" ); document.write( "\n" ); document.write( "You need to get either both x coefficients to be the same or both y's to be the same. Multiplying the top equation by two would result in the x coefficients being the same.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So, multiplying the first equation by 2 gives you:\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now you need to line up the two equations like you would a subtraction problem. We will be subtracting one equation from the other to eliminate the x's.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "minus \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Note:(As I'm new to the site, I'm not sure how to write this step best yet so I had to write the word minus rather than having them lined up one under the other and just having a minus sign off to the side to show that you'll be subtracting.)\r \n" ); document.write( "\n" ); document.write( "So 4x-4x=0 so the x's have been eliminated. \r \n" ); document.write( "\n" ); document.write( "2y-3y=-y and 10-14=-4\r \n" ); document.write( "\n" ); document.write( "Since the x's were eliminated, you're left with:\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( " Multiply or divide both sides by negative one to get:\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now, simply plug in your value for y into any equation from the problem. \n" ); document.write( "I'll use,\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Plugging in 4 for y gives you\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Subtract 4 from both sides\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Divide both sides by 2\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now you have both x and y so your solution is the ordered pair (1/2,4) \n" ); document.write( " |