document.write( "Question 54137: Solve each equation by the addition method. Determine whether the equation are independent, dependant, or inconsistent.\r
\n" ); document.write( "\n" ); document.write( "28. -3x + 2y = 8
\n" ); document.write( " 3x + 2y = 8
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #36434 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
Add the two equations together and eliminate the x's.
\n" ); document.write( "-3x+2y=8
\n" ); document.write( "+3x+2y=8
\n" ); document.write( "________
\n" ); document.write( "0+4y=16
\n" ); document.write( "4y=16
\n" ); document.write( "4y/4=16/4
\n" ); document.write( "y=4
\n" ); document.write( "Substitue y=4 into one of the equations and solve for x.
\n" ); document.write( "3x+2(4)=8
\n" ); document.write( "3x+8=8
\n" ); document.write( "3x+8-8=8-8
\n" ); document.write( "3x=0
\n" ); document.write( "3x/3=0/3
\n" ); document.write( "x=0
\n" ); document.write( "The solution appears to be (x,y)=(0,4)
\n" ); document.write( "-----------------------------------
\n" ); document.write( "Check by substitution into both equations:
\n" ); document.write( "-3(0)+2(4)=8
\n" ); document.write( "0+8=8
\n" ); document.write( "8=8 The first equation checks.
\n" ); document.write( "3(0)+2(4)=8
\n" ); document.write( "0+8=8
\n" ); document.write( "8=8 The second equation also checked, so we can say with confidence from a mountaintop that the solution is:
\n" ); document.write( "(x,y)=(0,4)
\n" ); document.write( "Happy Calcualting!!!
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