Please help me, am confused

[wish]

Simultaneous equations
A+B+C+D= 0 eqn i
2A+2B+3C+3D= 0 eqn ii
9A+9B+4C+4D= -1 eqn iii
18A-18B-12C+12D= 5 eqn iv

 

[Deleted member 4993]

Simultaneous equations
A+B+C+D= 0 eqn i
2A+2B+3C+3D= 0 eqn ii
9A+9B+4C+4D= -1 eqn iii
18A-18B-12C+12D= 5 eqn iv

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What method have you been taught for solving simultaneous linear equations.

Have you been taught Gauss-elimination (or Gauss-Jordan elimination) method?

Please show us what you have tried and exactly where you are stuck.

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