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Sagot :

2x - 5 = x - (3x + 4x)

2x - 5 = x - 3x - 4x

2x - 5 + 6x = -6x + 6x 

8x - 5 + 5 = 5

8x / 8 = 5 / 8

x = 5/8

 

2(1 - 4t) = 2t + 7 - (3t - 2)

2 - 8t = 2t + 7 - 3t + 2

2 - 8t - 2 = -t + 9 - 2

-8t + t = -t + 7 + t

-7t / - 7 = 7 / -7

t = -1

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