document.write( "Question 1075912: solve by substitution:
\n" ); document.write( "4x-5y=-11
\n" ); document.write( "x+2y=7
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #690560 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( " $\"4x-5y=-11\"$ ....eq.1
\n" ); document.write( " $\"x%2B2y=7\"$ .......eq.2
\n" ); document.write( "------------------
\n" ); document.write( " $\"x%2B2y=7\"$ .......eq.2......solve for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=7-2y\"$ .........substitute in eq.1\r
\n" ); document.write( "\n" ); document.write( " $\"4x-5y=-11\"$ ....eq.1
\n" ); document.write( " $\"4%287-2y%29-5y=-11\"$ .....solve for $\"y\"$
\n" ); document.write( " $\"28-8y-5y=-11\"$
\n" ); document.write( " $\"28-13y=-11\"$
\n" ); document.write( " $\"28%2B11=13y\"$
\n" ); document.write( " $\"39=13y\"$
\n" ); document.write( " $\"39%2F13=y\"$
\n" ); document.write( " $\"3=y\"$ \r
\n" ); document.write( "\n" ); document.write( "go to $\"x=7-2y\"$ , substitute $\"3\"$ for $\"y\"$ and solve for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=7-2%2A3\"$
\n" ); document.write( " $\"x=7-6\"$
\n" ); document.write( " $\"x=1\"$ \r
\n" ); document.write( "\n" ); document.write( "solutions: $\"x=1\"$ and $\"y=3\"$ \r
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\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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