Donner la valeur de x dans chacune des équations suivantes: 1) 5 + x = 84
2) 5x + 3 = 23
3) 3x - 49 = 26
4) 6x + 9x + x = 1360
5) 25x - 713x = -55'728
6) 69x + 58x = 3683
7) 5x + 6x - 13x + 59x = 798
8) 72x - 2x + 32x = 306
9) 2689x + 5987x - 123x = 504'627
10) 23x + 69x - 5987x + 26897x = 1'911'182
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