document.write( "Question 62419: 7x-4y=40
\n" ); document.write( "y-x=2 \n" ); document.write( "

Algebra.Com's Answer #43175 by funmath(2933) $\"\"$ $\"About$

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E1: 7x-4y=40
\n" ); document.write( "E2: y-x=2
\n" ); document.write( "Solve E2 for y and substitute that in for y in E1.
\n" ); document.write( "E2: y-x+x=x+2 --> $\"y=highlight%28x%2B2%29\"$
\n" ); document.write( "E1: $\"7x-4%2Ahighlight%28x%2B2%29=40\"$
\n" ); document.write( "7x-4x-8=40
\n" ); document.write( "3x-8=40
\n" ); document.write( "3x-8+8=40+8
\n" ); document.write( "3x=48
\n" ); document.write( "3x/3=48/3
\n" ); document.write( "x=16
\n" ); document.write( "Now substitue x=16 into E2 and solve for y.
\n" ); document.write( "y-16=2
\n" ); document.write( "y-16+16=2+16
\n" ); document.write( "y=18
\n" ); document.write( "The solutuion is (16,18)
\n" ); document.write( "Happy Calculating!!! \n" ); document.write( "

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