document.write( "Question 1042291: Your are going to solve a 3-by-3 system of equations. You will be guided through it step-by- step, as this is a bit of an advanced problem.
\n" ); document.write( "Equation 1: x + y + z = 2
\n" ); document.write( "Equation 2: x + y - z = -2
\n" ); document.write( "Equation 3: 2x - y + z = 5\r
\n" ); document.write( "\n" ); document.write( "Step 1: Combine equation 1 and 2 to get an equation only in x and y. Call this equation 4.
\n" ); document.write( "Step 2: Combine equation 1 and 3 to get another equation only in x and y. Call this equation 5. You will need to slightly modify one of the equations to eliminate z.
\n" ); document.write( "Step 3: Now that you have two equations in terms of only x and y ( Equations 4 and 5), use any method of your choice to solve for x and y.
\n" ); document.write( "Step 4: Now that you have x and y, solve for z using any of the first three equations. \n" ); document.write( "
Algebra.Com's Answer #657279 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
The problems are not identical but the method could or should be similar - Row Reduction, matrices.\r
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