Question

Решите уравнение подробно​

Answer 1

Ответ:

$\frac{5(x - 1) + 3(2x + 1)}{15} - \frac{3x - 1}{4} = 0 \\ \frac{5x - 5 + 6x + 3}{15} - \frac{3x - 1}{4} = 0 \\ \frac{11x - 2}{15} - \frac{3x - 1}{4} = 0 \\ \frac{4(11x - 2) - 20(3x - 1)}{60} = 0 | \div 60 \\ 4(11x - 2) - 20(3x -1) = 0 \\ 44x - 8 - 60x + 20 = 0 \\ - 16x + 12 = 0 \\ - 16x = - 12 | \times ( - 1) \\ 16x = 12 \\ x = \frac{12}{16} \\ x = \frac{3}{4} \\ x = 0.75$