Question

и объясните решить уравнения $1) \frac{3x - 1}{4} = 2 \\ 2) \frac{15}{25 - 5x} = 3 \\ 3) \frac{6x - 1}{9} = 3 \\ 4) \frac{63 - 4x}{9 } = 3 \\ 5) \frac{3x - 4}{8} = 4 \\ 6) \frac{69 - 7x}{5} = 4$
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Answer 1

Пошаговое объяснение:

$1) \frac{3x - 1}{4} = 2 \\ 3x - 1 = 2 \times 4 \\ 3x - 1 = 8 \\ 3x = 8 + 1 \\ 3x = 9 \\ x = 3 \\ 2) \frac{15}{25 - 5x} = 3 \\ 3(25 - 5x) = 15 \\ 25 - 5x = 5 \\ 25 - 5 = 5x \\ 20 = 5x \\ x = 4 \\ 3) \frac{6x - 1}{9} = 3 \\ 6x - 1 = 9 \times 3 \\ 6x - 1 = 27 \\ 6x = 27 + 1 \\ 6x = 28 \\ x = \frac{28}{6} \\ x = \frac{14}{3} \\ 4) \frac{63 - 4x}{9} = 3 \\ 63 - 4x = 9 \times 3 \\ 63 - 4x = 27 \\ 63 - 27 = 4x \\ 4x = 36 \\ x = 9 \\ 5) \frac{3x - 4}{8} = 4 \\ 3x - 4 = 32 \\ 3x = 32 + 4 \\ 3x = 36 \\ x = 12 \\ 6) \frac{69 - 7x}{5} = 4 \\ 69 - 7x = 20 \\ 69 - 20 = 7x \\ 49 = 7x \\ x = 7$