\[\boxed{\mathbf{389\ (389)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ при\ x = 58:\]
\[17x + 432 = 17 \cdot 58 + 432 =\]
\[= 1418.\]
\[2)\ при\ x = 554;\ \ y = 4900:\]
\[(739 - x) \cdot y =\]
\[= (739 - 554) \cdot 4900 =\]
\[= 906\ 500.\]