1,2-(x-1/4)=1/2 СРОЧНО УРАВНЕНИЕ 30 БАЛЛОВ

$1.2 - (x - \frac{1}{4} ) = \frac{1}{2} \\ \\ 1.2 - x + \frac{1}{4} = \frac{1}{2} \\ \\ \frac{12}{10} - x + \frac{1}{4} = \frac{1}{2} \\ \frac{12 \times 2}{10 \times 2} - x + \frac{1 \times 5}{4 \times 5} = \frac{1}{2} \\ \\ \frac{24}{20} - x + \frac{5}{20} = \frac{1}{2} \\ \\ \frac{29}{20} - x = \frac{1}{2} \\ \\ - x = \frac{1}{2} - \frac{29}{20} \\ \\ - x = \frac{1 \times 10}{2 \times 10} - \frac{29}{20} \\ - x = \frac{10}{20} - \frac{29}{20} \\ \\ - x = - \frac{19}{20} \\ x = \frac{19}{20}$
ответ: х=19/20