Question

układy równań

d)

{3x-11=y-2

{4x-3=-2(y-2)

e)

{1/2(x-1)+y=-2 1/2

{x-7=1-y

za 2 dam naj :)

Answer 1

{x=y/3+3

{4(y/3+3)=-2y+4

 

{x=y/3+3

{4/3y+12-3=-2y+4

3 1/3 y=-9

10/3y=-9

y=-3/2

 

x=(-3/2)/3+3

x=-1/2+3=2 1/2

e)

{1/2 x-1/2+y= - 2 1/2

{x-8=y  x=y+8

{1/2(y+8)+y=-2

1/2y+4+y=-2

 

{x=y+8

{1 1/2y=-6

 

{x=y+8

{y=-4

 

{x=4

{y=-4