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Réponse:
bonjour
4x+5=33
4x = 33-5
4x = 28
x = 28/4
x = 7
3x-5=5-5x
3x + 5x = 5 + 5
8x = 10
x = 10/8
x = 1,25
9-(11-7x) = -10
9 - 11 + 7x = -10
9 - 11 + 10 = - 7x
8 = -7x
x = - 8/7
2(x+4)=3(4-x)
2x + 8 = 12 - 3x
2x + 3x = 12 - 8
5x = 4
x = 4/5
x= 0,8
en espérant avoir pu t'aider