(x+2 5) :20 +7 1 =7 1 6 5 2

Решите задачу:

$(x + 2 \frac{5}{6} ) / 20 + 7 \frac{1}{5} = 7 \frac{1}{2}$

$(x + 2 \frac{5}{6} ) / 20 = 7 \frac{1}{2} - 7 \frac{1}{5}$

$(x + 2 \frac{5}{6} ) / 20 = \frac{75}{10} - \frac{72}{10}$

$(x + 2 \frac{5}{6} ) / 20 = \frac{3}{10}$

$x+2 \frac{5}{6} = \frac{3}{10} *20$

$x + 2 \frac{5}{6} = 6$

$x = 6 - 2 \frac{5}{6}$

$x = \frac{6}{1} - \frac{17}{6} = \frac{36-17}{6} = \frac{19}{6} = 3 \frac{1}{6}$