Question

Rezolvați sistemul :

Answer 1

fie1/( 4x-y)=a  si 1/(x+2y)=b

3a-5b=5,5                3a-5b=5,5                  10b=13          b=13/10
3b-a=2,5                 -3a+15b=7,5                a=3b-2,5       a=14/10

revenim
4x-y=10/13                  8x-2y=20/13            9x=150/182=75/91⇒x=75/819
x+2y=10/14                  x+2y=10/14              y=300/819-10/13⇒y=-330/819