Bonjour,
9
x+3 3+3x
x 3 3x
x+3+3+3x = 9
4x = 9-3-3
4x = 9-6
4x = 3
x= 3/4
7x -5
2x+1 x-4
2x 1 x-5
7x-5 =
2x+1 =x -4
2x-x = -4 -1
x = -5
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Bonjour,
9
x+3 3+3x
x 3 3x
x+3+3+3x = 9
4x = 9-3-3
4x = 9-6
4x = 3
x= 3/4
7x -5
2x+1 x-4
2x 1 x-5
7x-5 =
2x+1 =x -4
2x-x = -4 -1
x = -5