Question

Rozwiązcie mi en układ ma wyjsc x-3 y-4

12*x+ 6y=60 /:6

x+y=7

Answer 1

12x+6y=60:6                         x=7-y

x+y=7                                   -y=-4/(-)

       

x=7-y                                    x=7-4

2x+y=10                                y=4

 

x=7-y                                        x=3

2x(7-y)+y=10                             y=4

 

x=7-y                                                  Licze na Naj

14-2y+y=10

 

Answer 2

12x+6y=60

x+y=7

 

2x+y=10 

x+y=7 /*(-1)

2x+y=10

-x-y=-7

 

x=3

x+y=7

 

3+y=7
x=3

y=4
y=3