Question

prosze o rozwiazanie

z gory dzięx potrzebne na dziś

Answer 1

a)

-x=1 /*(-1)
x=-1

2*(-1)+y=4

-2+y=4

y=4+2

y=6

⇒y=3x+16

2x+3(3x+16)=-18

2x+9x+48=-18

11x=-18-48

11x=-66  /:11

x=6

-3*6+y=16

-18+y=16

y=16+18

y=34

[tex]\left \{ {{x=6} \atop {y=34}} \right[\tex]

Answer 2

3x+y=3                                3(-1)+6=3

2x+y=4                                 -3+6=3

y=3-3x                                  2(-1)+6=4

2x+3-3x=4                             -2+6=4

-x=4-3

-x=1

x=-1

y=3-3(-1)

y=3+3

y=6

 

2x+3y=-18                             2(-6)+3(-2)=-18

-3x+y=16                                -12-6=-18

y=16+3x                                   -3(-6)+(-2)=16

2x+3(16+3x)=-18                     18-2=16

2x+48+9x=-18

11x=-18-48

11x=-66

x=-6

y=16+3(-6)

y=16-18

y=-2