document.write( "Question 182242: How do you solve two problems at the same time and get a coordinationes
\n" ); document.write( "example 2c-d=-2 second problem is 4c+d=20 \n" ); document.write( "

Algebra.Com's Answer #136769 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
2c-d=-2
\n" ); document.write( " 4c+d=20
\n" ); document.write( "--------
\n" ); document.write( "This is called a system of equations.
\n" ); document.write( "You are asked to find a solution that
\n" ); document.write( "satisfies both equations.
\n" ); document.write( "---------
\n" ); document.write( "Add the two equation to solve for \"c\":
\n" ); document.write( "6c = 18
\n" ); document.write( "c = 3
\n" ); document.write( "----------------
\n" ); document.write( "Substitute into 2c - d = -2 to solve for \"d\":\r
\n" ); document.write( "\n" ); document.write( "2*3 - d = -2
\n" ); document.write( "d = 8
\n" ); document.write( "-------------------
\n" ); document.write( "Check the answer in both equations:
\n" ); document.write( "2c-d=-2
\n" ); document.write( "2*3 - 8 = -2
\n" ); document.write( "6 - 8 = -2
\n" ); document.write( "-2 = -2
\n" ); document.write( "--------------------
\n" ); document.write( " 4c+d=20
\n" ); document.write( "4*3 + 8 = 20
\n" ); document.write( "12 + 8 = 20
\n" ); document.write( "20 = 20
\n" ); document.write( "====================
\n" ); document.write( "Both check out so the solution is c=3, d=8
\n" ); document.write( "============================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "

\n" );