document.write( "Question 410820: Solve by substitution.\r
\n" ); document.write( "\n" ); document.write( "7x-6y=-80
\n" ); document.write( "5x+67=y\r
\n" ); document.write( "\n" ); document.write( "What is the solution?
\n" ); document.write( "Type an ordered pair. \n" ); document.write( "
Algebra.Com's Answer #288859 by angelagallegos(8)\"\" \"About 
You can put this solution on YOUR website!
7x-6y=-80
\n" ); document.write( "5x+67=y\r
\n" ); document.write( "\n" ); document.write( "first you are going to put the second equation into y= format: y=5x+67
\n" ); document.write( "now plug in 5x+67 for y in the first equation\r
\n" ); document.write( "\n" ); document.write( "7x-6(5x+67)= -80 distribute the 6
\n" ); document.write( "7x-30x-402= -80 combine like terms\r
\n" ); document.write( "\n" ); document.write( "7x-30x= -23x\r
\n" ); document.write( "\n" ); document.write( "-23x-402= -80 get x by itself, divide both sides by -23
\n" ); document.write( "x=-14
\n" ); document.write( "Plug in -14 in for x in the first equation\r
\n" ); document.write( "\n" ); document.write( "y= 5(-14)+67
\n" ); document.write( " -70+67
\n" ); document.write( " y = -3\r
\n" ); document.write( "\n" ); document.write( "to check plug both x and y in first equation
\n" ); document.write( "-3=5(-14)+67
\n" ); document.write( "-3=-70+67
\n" ); document.write( "-3= -3 true\r
\n" ); document.write( "\n" ); document.write( "your point is (-14, -3)
\n" ); document.write( "hope this helps
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