\[\boxed{\ \mathbf{426\ (426)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
Пояснение.
Решение.
\[1)\ 2 \cdot (a + 5) = 2a + 10\]
\[2)\ 8 \cdot (7 - x) = 56 - 8x\]
\[3)\ 12 \cdot (x + y) = 12x + 12y\]
\[4)\ (c - 9) \cdot 11 = 11c - 99\]
\[5)\ (8 + y) \cdot 16 = 128 + 16y\]
\[6)\ 15 \cdot (4a - 3) = 60a - 45\]
\[7)\ 7 \cdot (6a + 8b) = 42a + 56b\]
\[8)\ 10 \cdot (2m - 3n + 4k) =\]
\[= 20m - 30n + 40k\]
\[9)\ (24x + 17y - 36z) \cdot 4 =\]
\[= 96x + 68y - 144z\]
\[\boxed{\mathbf{426}\mathbf{\ (390)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ при\ \ x = 36:\]
\[976 - 24x = 976 - 24 \cdot 36 =\]
\[= 112.\]
\[2)\ при\ \ x = 367;\ \ y = 19\ 742:\]
\[x \cdot 63 - y =\]
\[= 367 \cdot 63 - 19\ 742 = 3379.\]