bonsoir
6 x + 5 = 7 x - 8
6 x - 7 x = - 8 - 5
- x = - 13
x = 13
13*6 + 5 = 83
13*7 - 8 = 83
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bonsoir
6 x + 5 = 7 x - 8
6 x - 7 x = - 8 - 5
- x = - 13
x = 13
13*6 + 5 = 83
13*7 - 8 = 83