document.write( "Question 26639: I AM TRYING TO HELP MY DAUGHTER SOLVE THE FOLLOWING PROBLEM:
\n" ); document.write( "x=3y
\n" ); document.write( "3y-6=2x\r
\n" ); document.write( "\n" ); document.write( "Can you help me to explain how to solve this for her? Where do I begin?\r
\n" ); document.write( "\n" ); document.write( "Thanks,
\n" ); document.write( "Jan
\n" ); document.write( "

Algebra.Com's Answer #14463 by wuwei96815(245)\"\" \"About 
You can put this solution on YOUR website!
There are several ways to solve this problem. Let's use the substitution method. Since we know the value of x (x=3y), we can substitute this value in the second equation and solve for y. \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "3y-6=2x
\n" ); document.write( "3y-6=2(3y)
\n" ); document.write( "3y-6=6y
\n" ); document.write( "-6=-3y+6y
\n" ); document.write( "-6=3y
\n" ); document.write( "-6/3=y
\n" ); document.write( "-2=y\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Now that we have the value for y we can go back and substitute this in either equation and solve for x.
\n" ); document.write( "x=3y
\n" ); document.write( "x=3(-2)
\n" ); document.write( "x=-6\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "So, x=-6 and y=-2.
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