Question

puteti sa ajutati cu acest exercitiul

Answer 1

4x1-x2-5x3=1

x1+x2-2x3=6 |•(-3)

3x1-2x2-6x3=-2

-3x1-3x2+6x3=-18

3x1-2x2-6x3=-2

___________"+"

0-5x2+0=-20

5x2=20=>x2=10

4x1-x2-5x3=1

x1+x2-2x3=6

4x1-5x3=11

x1-2x3=-4 |(-4)

4x1-5x3=11

-4x1+8x3=16

__________"+"

0+3x3=27<=>3x3=27=>x3=9

x1-2x3=-4<=>x1=-4+2•9=-4+18=14

x1=14

x2=10

x3=9