document.write( "Question 716459: how do you slove ts question usingthe sub method
\n" ); document.write( "6x+14y=54
\n" ); document.write( "3x+5y=30 \n" ); document.write( "

Algebra.Com's Answer #439878 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Subtraction method?
\n" ); document.write( "Multiply both sides of (2) by $\"+2+\"$
\n" ); document.write( "and subtract (2) from (1)
\n" ); document.write( " $\"+6x+%2B14y+=54%0D%0A%7B%7B%7B+-6x+-+10y+=-60+\"$
\n" ); document.write( " $\"+4y+=+-6+\"$
\n" ); document.write( " $\"+y+=+-3%2F2+\"$
\n" ); document.write( "Substitute this result back into (1) or (2)
\n" ); document.write( " $\"+3x%2B5y=30+\"$
\n" ); document.write( " $\"+3x%2B5%2A%28-3%2F2%29+=+30+\"$
\n" ); document.write( " $\"+3x+=+30+%2B+15%2F2+\"$
\n" ); document.write( " $\"+3x+=+75%2F2+\"$
\n" ); document.write( " $\"+x+=+25%2F2+\"$
\n" ); document.write( "------------
\n" ); document.write( "check the answers:
\n" ); document.write( " $\"+6x%2B14y+=+54+\"$
\n" ); document.write( " $\"+3x+%2B+7y+=+27+\"$
\n" ); document.write( " $\"+3%2A%2825%2F2%29+%2B+7%2A%28-3%2F2%29+=+27+\"$
\n" ); document.write( " $\"+75+-+21+=+54+\"$
\n" ); document.write( " $\"+54+=+54+\"$
\n" ); document.write( "OK
\n" ); document.write( "You can check the other equation\r
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