Bonsoir je suis en 4eme, j'ai besoin de vous pour mes exercices de maths sur des équations.

exercice 42 :
a) 2x-3 = 4+x b) y+4 = -4-3y

exercice 43 :
a) 7x-6 = 4-3x b) 12-a = 18-3a

exercice 44 :
a) -t-4 = 8+7t b) 13x+11 = 8x+28
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