document.write( "Question 258069: What multiplier should be used for each of the following equations to eliminate one unknown by subtraction?\r
\n" ); document.write( "\n" ); document.write( "3x- y=7
\n" ); document.write( "2x+7y=42
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Algebra.Com's Answer #189921 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
multiply the first by 7 so you can add them.
\n" ); document.write( "multiply by -7 to subtract them
\n" ); document.write( "multiply the first by 2 and the second by 3 to subtract
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