Question 199720: Can someone please help me with this:
Use the Gauss-Jordan method to solve the system of equations.
4x - 6y = 54
20x - 30y = 270
a. (9,-3)
b. (27/2 - 3/2y, y)
c. (27/2 + 3/2y, y)
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Use the Gauss-Jordan method to solve the system of equations.
4x - 6y = 54
20x - 30y = 270
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Subtract 5 times the 1st Eq. from the 2nd to get:
4x - 6y = 54
0 + 0 = 0
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Solve the 1st equation for x:
6y = 4x-54
4x = 6y + 54
x = (3/2)y + (27)/2
-----------------------
The answer is "c".
Cheers,
Stan H.
a. (9,-3)
b. (27/2 - 3/2y, y)
c. (27/2 + 3/2y, y)
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