document.write( "Question 248075: solve this equation.\r
\n" ); document.write( "\n" ); document.write( "x+3y=-13
\n" ); document.write( "3x+y=1 \n" ); document.write( "
Algebra.Com's Answer #180817 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
which equation do you want solved?
\n" ); document.write( "or do you mean solve these equations? the system of equations?
\n" ); document.write( "since you don't say how to solve them we will go for elimination.
\n" ); document.write( "multiply the first by 3
\n" ); document.write( "x+3y=-13\r
\n" ); document.write( "\n" ); document.write( "3x+9y=-39
\n" ); document.write( "3x+y=1
\n" ); document.write( "subtract the last from the new one
\n" ); document.write( "8y=-40
\n" ); document.write( "divide by 8
\n" ); document.write( "y=-5
\n" ); document.write( "substitute -5 in last one
\n" ); document.write( "3x+y=1
\n" ); document.write( "3x-5=1
\n" ); document.write( "add five to both sides
\n" ); document.write( "3x=6
\n" ); document.write( "divide both sides by 3
\n" ); document.write( "x=2
\n" ); document.write( "check by plugging in this one\r
\n" ); document.write( "\n" ); document.write( "x+3y=-13
\n" ); document.write( "2+3(-5)=-13
\n" ); document.write( "2-15=-13
\n" ); document.write( "-13=-13
\n" ); document.write( "ok\r
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