Question

ma ajutati macar la a b c nu la tuate ​

Answer 1

Răspuns:

SALUT!

a.{2y=11-x.

{8x-2y=-2

<=>8x-(11-x)=-2 <=>9x=9=>x=1

8*1-2y=-2<=>-2y=-10;y=5.

b.{x=-10-3y

{-x+2y=-5

<=>-(-10-3y)+2y=-5;y=-3

x=-10-3(-3);x=-1.

c.{2x-3y=7,5

{y=-4,1-5x

<=>2x-3(-4,1-5x)=7,5;x= - 24/85

y=-4,1-5(- 24/85);y= - 457/170.

Sper sa fie corecte......