document.write( "Question 435214: I am working on solving systems by substitution and elimination. An example problem is {-7x-y=-31 nxt line -7x=23 I have x=-23/7 y=-7(-23/7)+31=54. my question is how do I get the 54??? \n" ); document.write( "

Algebra.Com's Answer #301282 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!


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document.write( "Hi
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document.write( "-7x=23              |Yes, x = -23/7
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document.write( "-7x-y=-31 
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document.write( "-7*-23/7 - y = -31  |substituting for x
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document.write( "  23 - y = -31      |solving for y   Note: 
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document.write( "    54 = y \n" );
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