\[\boxed{\mathbf{2.}\mathbf{225}\mathbf{.ОК\ ГДЗ - домашка\ на\ }5}\]
Пояснение.
Решение.
\[\textbf{а)}\ (z + 279) - 99 =\]
\[= z + 279 - 99 = z + 180\]
\[z = 56:\]
\[56 + 180 = 236.\]
\[z = 75:\]
\[75 + 180 = 255.\]
\[\textbf{б)}\ (981 + c) - 439 =\]
\[= 981 + c - 439 = 542 + c\]
\[c = 45:\]
\[542 + 45 = 587.\]
\[c = 87:\]
\[542 + 87 = 629.\ \]
\[\textbf{в)}\ (465 - x) - 265 =\]
\[= 465 - x - 265 = 200 - x\]
\[x = 34:\]
\[200 - 34 = 166.\]
\[x = 98:\]
\[200 - 98 = 102.\]
\[\textbf{г)}\ 1038 - (38 + n) =\]
\[= 1038 - 38 - n = 1000 - n\]
\[n = 78:\]
\[1000 - 78 = 922.\]
\[n = 0:\]
\[1000 - 0 = 1000.\ \]