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Sagot :

Bonjour,

  -3(5x-4)-(-7+9x)+5(8x-1)

= -15x+12+7-9x+40x-5

= 16x+14

=-3 (5x-4) - (-7+9x) +5 (8x-1)

=(-15x+12)-(-7+9x)+40x-5

=- 15x+12+7-9x+40x-5

=18x+14

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