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3y=-2x-19 -5x-3y=-2

Sagot :

3y=-2x-19 -5x-3y=-2-5x - (-2x - 19) = -2
-5x + 2x + 19 = -2
-3x = -21
x = 7

3y = -2(7) - 19
3y = -14 - 19
3y = 33
y = 11
Panoyin
3y = -2x - 19 ⇒   2x +  3y = -19
-5x - 3y = -2  ⇒ -5x -   3y = -2
                                   -3x = -17
                                    -3      -3
                                      x = 5²/₃
                           -5x - 3y = -2
                     -5(5²/₃) - 3y = -2
                       -28¹/₃ - 3y = -2
                     + 28¹/₃          + 28¹/₃
                                  -3y = 26¹/₃
                                   -3      -3
                                     y = -8⁷/₉
                               (x, y) = (5²/₃, -8⁷/₉)
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