document.write( "Question 177885: 2x+3y=35
\n" ); document.write( "5x+4y=7
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\n" ); document.write( "please solve please thank you! \n" ); document.write( "

Algebra.Com's Answer #132872 by jojo14344(1513) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "Line Eqn's:
\n" ); document.write( " $\"2x%2B3y=35\"$ , EQN 1
\n" ); document.write( " $\"5x%2B4y=7\"$ , EQN 2----> $\"y=%28-5x%2B7%29%2F4=-%285%2F4%29x%2B%287%2F4%29\"$ , EQN 3
\n" ); document.write( "In EQN 1 we get,
\n" ); document.write( " $\"3y=35-2x\"$ ----> $\"cross%283%29y%2Fcross%283%29=%2835-2x%29%2F3\"$
\n" ); document.write( " $\"y=-%282%2F3%29x%2B%2835%2F3%29\"$ , EQN 4, subst. in EQN 2:
\n" ); document.write( " $\"5x%2B4%28%28-2%2F3%29x%2B%2835%2F3%29%29=7\"$
\n" ); document.write( " $\"5x-%288%2F3%29x%2B%28140%2F3%29=7\"$
\n" ); document.write( " $\"%2815x-8x%29%2F3=7-%28140%2F3%29\"$
\n" ); document.write( " $\"7x%2F3=%287-140%29%2F3=%2821-140%2F3%29\"$
\n" ); document.write( " $\"7x%2F3=-119%2F3\"$ ----> $\"7x=cross%283%29%2A%28-119%2Fcross%283%29%29\"$
\n" ); document.write( " $\"cross%287%29x%2Fcross%287%29=cross%28-119%2917%2Fcross%287%29\"$
\n" ); document.write( " $\"highlight%28x=-17%29\"$ subt. in EQN 3 or EQN 4:
\n" ); document.write( "We use EQN 3:
\n" ); document.write( " $\"y=-%282%2F3%29%28-17%29%2B%2835%2F3%29\"$
\n" ); document.write( " $\"y=34%2F3%2B%2835%2F3%29=highlight%2869%2F3=23%29\"$
\n" ); document.write( "We see the graph:
\n" ); document.write( "----> RED Line, EQN 1; GREEN Line EQN 2
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo\r
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