document.write( "Question 281318: I should have said that one side is 5x+y and the opposite side is 7, the other part of the problem is that the side is 3x-4y and it's opposite side is 18. I know that x=2 and y=-3 but I need to know how to show my daughter how to get the answer. \n" ); document.write( "
Algebra.Com's Answer #204334 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
Opposite sides are equal.
\n" ); document.write( "5x+y=7
\n" ); document.write( "3x-4y=18
\n" ); document.write( "solve by substitution or elimination\r
\n" ); document.write( "\n" ); document.write( "x=2 y=-3
\n" ); document.write( "
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