document.write( "Question 342648: If x + 4 y = 10 and - x + 5 y = 8 what is the value of 3x - 2? \n" ); document.write( "

Algebra.Com's Answer #245252 by Fombitz(32388) $\"\"$ $\"About$

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Add the two equations together.
\n" ); document.write( " $\"x%2B4y-x%2B5y=10%2B8\"$
\n" ); document.write( " $\"9y=18\"$
\n" ); document.write( " $\"y=2\"$
\n" ); document.write( "Then use an equation to solve for x.
\n" ); document.write( " $\"x%2B4%282%29=10\"$
\n" ); document.write( " $\"x%2B8=10\"$
\n" ); document.write( " $\"x=2\"$
\n" ); document.write( "So then
\n" ); document.write( " $\"3x-2=3%282%29-2\"$
\n" ); document.write( " $\"3x-2=6-2\"$
\n" ); document.write( " $\"3x-2=4\"$
\n" ); document.write( " \n" ); document.write( "

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