Question

x+y=83

x-20%x+y+2=83-8

x+y=63

x-3+y-20%y=63-4

są to układy równań prosze pomóżcie to jest na dzisiaj!!

Answer 1

x+y=83

x-20%x+y+2=83

x+y=83

0,8x+y=81

-x-y=-83

0,8x+y=81

-0,2x=-2/(-0,2)

x=10

x=10

10+y=83

x=10

y=73

 

x+y=63

x-3+y-20%y=63-4

x+y=63

x+0,8y=62

-x-y=-63

x+0,8y=62

-0,2y=-1/(-0,2)

y=5

y=5

x=58

 

Proszę ;)

Answer 2

x+y=83

x-20prx+y+2=83-8

 

y=83-x

x-20prx+83-x=73

 

y=83-x

-20prx=-83+73=-10

 

y=83-x

x=-0,5

 

y=83-0,5

x=-0,5

y=82,5

 

x+y=63

x-3+y-20pry=59

 

x=63-y

63-y-3+y-20pry=59

 

x=63-y

20pry=59-60

 

x=63-y

20pry=-1

y=-0,05

 

x=63+0,05=63,05