document.write( "Question 109690: Solve system by elimination
\n" ); document.write( "y-7=x
\n" ); document.write( "x+y=13 \n" ); document.write( "

Algebra.Com's Answer #79959 by solver91311(24713) $\"\"$ $\"About$

You can put this solution on YOUR website!
Start by putting your equations into standard form: $\"ax%2Bby=c\"$
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\n" ); document.write( " $\"-x%2By=7\"$
\n" ); document.write( " $\"x%2By=13\"$
\n" ); document.write( ":
\n" ); document.write( "You can eliminate the $\"x\"$ term in this case by simply adding the two equations, term by term:
\n" ); document.write( ":
\n" ); document.write( " $\"0x%2B2y=20\"$
\n" ); document.write( " $\"2y=20\"$
\n" ); document.write( " $\"y=10\"$
\n" ); document.write( ":
\n" ); document.write( "You can solve for $\"x\"$ by either substitution now that you know the value of $\"y\"$ , or you can go back to your original equation set and SUBTRACT the two equations, term by term:
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\n" ); document.write( " $\"-2x%2B0y=-6\"$
\n" ); document.write( " $\"x=3\"$
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