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

[latex](x + 2 \frac{5}{6} ) / 20 + 7 \frac{1}{5} = 7 \frac{1}{2} [/latex] [latex](x + 2 \frac{5}{6} ) / 20 = 7 \frac{1}{2} - 7 \frac{1}{5} [/latex] [latex](x + 2 \frac{5}{6} ) / 20 = \frac{75}{10} - \frac{72}{10} [/latex] [latex](x + 2 \frac{5}{6} ) / 20 = \frac{3}{10} [/latex] [latex]x+2 \frac{5}{6} = \frac{3}{10} *20[/latex] [latex]x + 2 \frac{5}{6} = 6[/latex] [latex]x = 6 - 2 \frac{5}{6} [/latex] [latex]x = \frac{6}{1} - \frac{17}{6} = \frac{36-17}{6} = \frac{19}{6} = 3 \frac{1}{6} [/latex]