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30 Développer et réduire les expressions.
A = 3(x + 8) + 4(7x + 2)
B = 5(x - 1) – 7x(2 + 3x)
C= 2x(4 - 5x) - (x - 7)
D = (3-8x) - 5(4x - 7)
E = 7(3 - 2x) - 4x(2x - 1)
F = 7x - 5(2- 9x) + 7(9x - 1)​

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