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Solve by elimination 5x-14y=22 -6x+7y=3

Sagot :

5x - 14y = 22 ⇒   5x - 14y = 22
-6x + 7y =  3  ⇒ 12x - 14y = -6
                                    -7x = 28
                                     -7     -7
                                       x = -4
                            5x - 14y = 22
                         5(-4) - 14y = 22
                           -20 - 14y = 22
                         + 20           + 20
                                  -14y = 42
                                  -14    -14
                                       y = -3
                                  (x, y) = (-4, -3)