document.write( "Question 333493: solve using the substitution method\r
\n" ); document.write( "\n" ); document.write( " $\"8s+%2B+12t+=+16+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"6s+%2B+9t+=+12\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "I could really use some help on this one please. \n" ); document.write( "

Algebra.Com's Answer #238961 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
solve using the substitution method
\n" ); document.write( "8s + 12t = 16
\n" ); document.write( "6s + 9t = 12
\n" ); document.write( "---------------
\n" ); document.write( "Reduce the equations
\n" ); document.write( "8s + 12t = 16 --> 2s + 3t = 4
\n" ); document.write( "6s + 9t = 12 --> 2s + 3t = 4
\n" ); document.write( "---------------
\n" ); document.write( "It's the same equation --> no unique solution.
\n" ); document.write( "They're dependent --> infinite # of solutions.
\n" ); document.write( "----------------
\n" ); document.write( "8s + 12t = 16
\n" ); document.write( "6s + 9t = 12 --> s = (4-3t)/2
\n" ); document.write( "---------------
\n" ); document.write( "Sub for s in the 1st eqn
\n" ); document.write( "8(4-3t)/2 + 12t = 16
\n" ); document.write( "16 - 12t + 12t = 16
\n" ); document.write( "16 = 16 \n" ); document.write( "

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