document.write( "Question 165846: CLASSIFY EACH SYSTEM AND DERTERMINE THE NUMBER OF SOLUTIONS.\r
\n" ); document.write( "\n" ); document.write( " Y=-4X+7
\n" ); document.write( " 12X+3Y=21 \n" ); document.write( "

Algebra.Com's Answer #122247 by jojo14344(1513) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "Line equations --- $\"system%28y=-4x%2B7%2C12x%2B3y=21%29\"$
\n" ); document.write( "1st eqn, it follows slope intercept form $\"y=mx%2Bb\"$ ---> working eqn
\n" ); document.write( "slop; $\"-4\"$ & y intercept; $\"7\"$
\n" ); document.write( "f(y)=0 ---> $\"-7=-4x\"$ ---> $\"-7%2F-4=cross%28-4%29x%2Fcross%28-4%29\"$
\n" ); document.write( " $\"x=7%2F4\"$
\n" ); document.write( "2nd eqn,via working eqn:
\n" ); document.write( " $\"12x%2B3y=21\"$
\n" ); document.write( " $\"y=%2821-12x%29%2F3\"$ ----> $\"y=%2821%2F3%29-%2812x%2F3%29\"$
\n" ); document.write( " $\"y=-4x%2B7\"$ ----> same as 1st eqn! y-intercept @ 7
\n" ); document.write( "f(y)=0 ---> $\"x=7%2F4\"$
\n" ); document.write( "We'll see the graph:
\n" ); document.write( " -- 2 identical lines of the same eqn; points(7/4,7)
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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