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Correction des exercices - Euler

Exercice 15 p 90. a) 2x + 1 = 4 b) 7 + 5x = 4 c) 4x ? 3 = -7. 2x + 1 ? 1 = 4 ? 1 7 +
5x ? 7= 4 ? 7 4x ? 3 + 3 = -7 + 3. 2x = 3 5x = -3 4x = -4. x = x = x = x = 1,5 x = -0,6 ...

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