Resposta :

alexandrefs116
10x = 30 + 80         2x + 10 = 2x 20                 3x + 2 = x + 8         4x + 3 +2x = 4x
10x = 110               2x = 40x - 10                     3x - x = 8 - 2               6x = 4x - 3
x = 110/10             2x - 40x = -10                     2x = 6                         6x - 4x = -3
x = 11                       - 38x = -10                         x = 6/2                      2x = -3
                                    x = 10/38                        x = 3                         x = -3/2
                                    x = 5/19

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