Asked by Asianthatsuxatmath

If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the third equation.
2x - 3y + z = -4
2x - 2y + z = -1
x - 2y + 3z = -6

5x + 7y = 6
y - 4 = -1

-y - 1 = -4
-5x + 4y = -3

y - 5z = 8
2y - 5z = 11

-7y + 7z = 8
-6y + 7z = 11
Answered by Andrew Magdy Kamal
The answer is:
-y - 1 = -4
-5x + 4y = -3
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