52 \(\times\) ( y : 78) = 3380
y : 78 = 3380: 52
y : 78 = 65
y = 65 \(\times\) 78
y = 5070
y: 55 - y + 33 = 76
\(y\) \(\times\) ( \(\dfrac{1}{55}\) - 1) = 76 - 33
y \(\times\) ( \(\dfrac{-54}{55}\) ) = 43
y = 43 : (- \(\dfrac{54}{55}\))
y = - \(\dfrac{2365}{54}\)