document.write( "Question 238509: solve by the substition method 9x+9y=-27 and -4x+y=22 \n" ); document.write( "

Algebra.Com's Answer #175232 by Fombitz(32388) $\"\"$ $\"About$

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Use eq. 2,
\n" ); document.write( " $\"y=4x%2B22\"$
\n" ); document.write( "Substitute into eq. 1, but simplify eq. 1 first,
\n" ); document.write( " $\"9x%2B9y=-27\"$
\n" ); document.write( " $\"x%2By=-3\"$
\n" ); document.write( " $\"x%2B%284x%2B22%29=-3\"$
\n" ); document.write( " $\"5x%2B22=-3\"$
\n" ); document.write( " $\"5x=-25\"$
\n" ); document.write( " $\"x=-5\"$
\n" ); document.write( "Use either eq. to find y.
\n" ); document.write( " $\"y=4x%2B22\"$
\n" ); document.write( " $\"y=4%28-5%29%2B22\"$
\n" ); document.write( " $\"y=2\"$
\n" ); document.write( "(x,y)=(-5,2)
\n" ); document.write( " \n" ); document.write( "

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