document.write( "Question 803529: I think I solved this correctly, but just wanted to check:\r
\n" ); document.write( "\n" ); document.write( "9y+3x=18; -3y-x=-6\r
\n" ); document.write( "\n" ); document.write( "9y=18-3x
\n" ); document.write( "y=2-1/3x\r
\n" ); document.write( "\n" ); document.write( "Substitution for -3y-x=-6
\n" ); document.write( "-3(2-1/3x)-x=-6
\n" ); document.write( "-6-x-x=-6
\n" ); document.write( "-6-2x=-6
\n" ); document.write( "x=6\r
\n" ); document.write( "\n" ); document.write( "9y+3(6)=18
\n" ); document.write( "9y=0
\n" ); document.write( "y=0
\n" ); document.write( "We are supposed to solve for either variable and use the solution to determine the second variable. \r
\n" ); document.write( "\n" ); document.write( "I got x=6, y=0, but am unsure if this is correct.
\n" ); document.write( "

Algebra.Com's Answer #484397 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
9y+3x=18 --> x + 3y = 6
\n" ); document.write( "-3y-x=-6 --> x + 3y = 6
\n" ); document.write( "---------------
\n" ); document.write( "It's the same eqn twice
\n" ); document.write( "--> no unique solution, an infinite number of solutions.
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