Solve the system of equations using gaussian elimination method.
x + y + z - t = 4
2x - y +2z +3t = -8
-x + 2y - 3z + t = 4
3x + y + 2z - 3t = 9

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step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

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step-by-step explanation: