Příklady z matematiky

              2x + 7y- 18 = 4( x + y )

             5x – 4y – 13 = 2( x – y )

             2x + 7y – 18 = 4x +4y

             5x – 4y – 13 = 2x – 2y

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

                      3x – 2y = 13  / ( 2)

                     -6x + 9y = 54

                      6x – 4y = 26

                              5y = 80

                                 y = 16

 

x =                     = 15

 

 

L1 =2.15 +7.16 –18 = 124

P1 = 4(15 + 16) = 124

 

L2 = 5.15- 4.16- 13 = -2

P2 = 2( 15 – 16) = -2

 

 

                                 P = [ 15 ;  16 ]