SOLUTION: Use a software program or a graphing utility to solve the system of linear equations. (Round your values to three decimal places. If there is no solution, enter NO SOLUTION. If t

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Use a software program or a graphing utility to solve the system of linear equations. (Round your values to three decimal places. If there is no solution, enter NO SOLUTION. If t      Log On


   

Question 1122192: Use a software program or a graphing utility to solve the system of linear
equations. (Round your values to three decimal places. If there is no
solution, enter NO SOLUTION. If the system has an infinite number of
solutions, set x4 = t and solve for x1, x2, and x3 in terms of t.)
x1 − 2x2 + 5x3 − 3x4 = 23.2
x1 + 4x2 − 7x3 − 2x4 = 45.6
3x1 − 5x2 + 7x3 + 4x4 = 29.8
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
Use your TI-83 or 84 calculator. Use 2ND x-1
to access the matrix capability.

Enter this as a 3x5 matrix:



Press 2ND x-1
Press Right arrow   (to highlight MATH)
Press Up arrow 5 times to highlight B:rref(
Press ENTER
Press 2ND x-1
Press 1
Type a right parenthesis
Press ENTER
Read this rounded to three decimal places:



Interpret that as:



Simplify as



Solve for the x's



Replace the x4's by t



Edwin