ГДЗ по математике 5 класс Мерзляк Задание 434

\[\boxed{\ \mathbf{434\ (434)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ при\ p = 14:\]

\[13p + 37p = p(13 + 37) =\]

\[= 50p = 50 \cdot 14 = 700.\]

\[2)\ при\ b = 54:\]

\[72b - 43b = b(72 - 43) =\]

\[= 29b = 29 \cdot 54 = 1566.\]

\[3)\ при\ x = 678:\]

\[38x + 17x - 54x + x =\]

\[= x(38 + 17 - 54 + 1) = 2x =\]

\[= 2 \cdot 678 = 1356\]

\[4)\ при\ c = 47:\]

\[86c - 35c - c + 296 =\]

\[= c(86 - 35 - 1) + 296 =\]

\[= 50c + 296 = 50 \cdot 47 + 296 =\]

\[= 2350 + 296 = 2646.\]