9целых 5/13-(7целых6/13-у)=2целых3/13

9 5/13-(7 6/13-у)=2 3/13 9 5/13-7 6/13+у=2 3/13 у=2 3/13+7 6/13-9 5/13 у=9 9/13-9 5/13 у=4/13

[latex]\frac{9,5}{13} -( \frac{7,6}{13} -y)= \frac{2,3}{13} [/latex] [latex]\frac{9,5}{13} -\frac{7,6}{13} +y= \frac{2,3}{13} [/latex] [latex]\frac{1,9}{13}+y= \frac{2,3}{13} [/latex] [latex]\frac{1,9}{13}+y- \frac{2,3}{13} =0[/latex] [latex]\frac{-0,4}{13}+y=0 [/latex] [latex]y=-\frac{-0,4}{13}[/latex] [latex]y=\frac{4}{130} [/latex] [latex]y=\frac{2}{65} [/latex]