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Sagot :

Explications étape par étape:

[tex]1) \: \: - 5 + 15x + 2 = 13x + 7 \\ 15x - 13x = 7 + 5 - 2 \\ 2x = 10 \\ x = 5[/tex]

[tex]2) \: \: \frac{2(2x - 1)}{2 \times 3} + \frac{3(1 - x)}{3 \times 2} = \frac{6(x + 3)}{6} \\ \frac{4x - 2}{6} + \frac{3 - 3x}{6} = \frac{6x + 18}{6} \\ 4x - 2 + 3 - 3x = 6x + 18 \\ x - 6x = 18 - 1 \\ - 5x = 17 \\ x = - \frac{17}{5} [/tex]

[tex]3) \: \: (4x - 1)(2 - 3x) = 0 \\ 4x - 1 = 0 \: ou \: 2 - 3x = 0 \\ 4x = 1 \: ou \: - 3x = - 2 \\ x = \frac{1}{4} ou \: x = \frac{2}{3} [/tex]

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