SOLUTION: 40x+3y+9z=35 15x+16y+11z=50.5 11x+10y+300z=370 Please help me to solve this, thank you!

Question 1076553: 40x+3y+9z=35
15x+16y+11z=50.5
11x+10y+300z=370
Please help me to solve this, thank you!
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
40x+3y+9z=35
15x+16y+11z=50.5
11x+10y+300z=370
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Inconvenient coefficiencts.
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I would use determinants, or Cramer's rule.
====
For the Det:

|40    3    9|
|15   16   11|
|11   10  300|

Det = 40*(16*300 - 10*11) - 3*(15*300 - 11*11) + 9*(15*10 - 11*16)
Det = 187600 - 13137 - 234
Det = 174229
=======================
Do you know how to do the rest?
You can check your answers using an online matrix solver.

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