6/13 : (1/2 + y) = 15/39
1/2 + y = 6/13 : 15/39
1/2 + y = 234/195
y = 234/195 - 1/2
y = ...
\(\frac{6}{13}:\left(\frac{1}{2}+y\right)=\frac{15}{39}\)
\(\frac{1}{2}+y=\frac{6}{13}:\frac{15}{39}\)
\(\frac{1}{2}+y=\frac{6}{5}\)
\(y=\frac{6}{5}-\frac{1}{2}\)
\(y=\frac{7}{10}\)
6/13 : (1/2 + y) = 15/39
1/2 + y = 6/13 : 15/39
1/2 + y = 6/5
y = 6/5 - 1/2
y = 7/10
1/2+y=6/13:15/39
1/2+y=6/5
y=6/5-1/2
y=7/10