Bonjour,
-3x + x = x(-3 + 1) = -2x
-2x - x = x(-2 - 1) = -3x
3,5x - 0,7x = 7x(0,5 - 0,1) = 2,8x
x - 7x = x(1 - 7) = -6x
Bonne journée :)
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Bonjour,
-3x + x = x(-3 + 1) = -2x
-2x - x = x(-2 - 1) = -3x
3,5x - 0,7x = 7x(0,5 - 0,1) = 2,8x
x - 7x = x(1 - 7) = -6x
Bonne journée :)