document.write( "Question 181816This question is from textbook Elementary and Intermediate
\n" ); document.write( ": The Addition Method x-2y=-1 Solve system by addition
\n" ); document.write( " -x+5y=4 \n" ); document.write( "

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x-2y=-1 .........eq 1
\n" ); document.write( "-x+5y=4 .........eq 2
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\n" ); document.write( "this is perfectly set up for addition(elimination is a better name in my opinion). We will be adding the terms of each equation together..the x terms with the x terms the y terms with the y terms....and constants with the constants. As you can see when you add the x terms they are eliminated because x-x=0. We are left with -2y+5y=-1+4
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\n" ); document.write( "3y=3
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\n" ); document.write( "now we take y's found value of 1 and plug it back into eq 1 or 2 and solve for x. I will use eq 1
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\n" ); document.write( "x-2(1)=-1
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\n" ); document.write( "solution to this system of equations is (1,1)
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