§ Задание 2
\[\boxed{\text{5.\ 2}}\]
\[\textbf{а)}\ a + (b - c) = a + b - c\]
\[\textbf{б)}\ a - (b + c) = a - b - c\]
\[\textbf{в)}\ c + ( - a + b) = c - a + b\]
\[\textbf{г)}\ a - ( - b - c) = a + b + c\ \]
\[\boxed{\text{5.\ 2}}\]
\[\textbf{а)}\ a + (b - c) = a + b - c\]
\[\textbf{б)}\ a - (b + c) = a - b - c\]
\[\textbf{в)}\ c + ( - a + b) = c - a + b\]
\[\textbf{г)}\ a - ( - b - c) = a + b + c\ \]