Příklady z matematiky

                5( 3x+4)-8( x-6y) = 215

               20(2x-3y)-13(x-y) = 520

                15x +20 -8y +48y = 215

             40x -60y -13x +13y = 520

                               7x + 68y = 215  / ( 27)

                             27x – 47y = 520  / (-7)

                       189x + 1836y = 5805

                        -189x + 329y = -3640

                                   2156y = 2165

                                             y = 1

 

x =                       = 21

 

 

L1 = 5(3.21+4) -8(21-6.1) = 5.67 -8.15 = 215

P1 = 215

 

L= 20(2.21-3.1) -13(21-1) = 20.39 -13.20 = 520

P2 = 520

 

 

                                 P = [ 21;  1 ]