document.write( "Question 470476: Solve by substitution x=2y
\n" ); document.write( " y=2x+3 Check answer \n" ); document.write( "

Algebra.Com's Answer #322692 by MathLover1(20849) $\"\"$ $\"About$

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\n" ); document.write( "Solve by substitution \r
\n" ); document.write( "\n" ); document.write( " $\"x=2y\"$ ......1
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\n" ); document.write( " $\"y=2x%2B3\"$ ....2
\n" ); document.write( "----------------------substitute $\"x\"$ with $\"2y\"$ in 2\r
\n" ); document.write( "\n" ); document.write( " $\"y=2%2A2y%2B3\"$ ....2.solve for $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=4y%2B3\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-3=4y-y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-3=3y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-3%2F3=y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-1=y\"$ ..now find $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=2y\"$ ......1\r
\n" ); document.write( "\n" ); document.write( " $\"x=2%28-1%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=-2\"$ \r
\n" ); document.write( "\n" ); document.write( "check:\r
\n" ); document.write( "\n" ); document.write( " $\"y=2x%2B3\"$ ....2\r
\n" ); document.write( "\n" ); document.write( " $\"-1=2%28-2%29%2B3\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-1=-4%2B3\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-1=-1\"$ \r
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\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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