bjr
nbre 7
x5 35
+4 39
- 2x7 39-14 = 25
nbre x
*5 5x
+4 5x+4
-2x 3x + 4
c
3x + 4 = 16
3x = 12
x = 4 au départ
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bjr
nbre 7
x5 35
+4 39
- 2x7 39-14 = 25
nbre x
*5 5x
+4 5x+4
-2x 3x + 4
c
3x + 4 = 16
3x = 12
x = 4 au départ