§ Задание 210
\[\boxed{\mathbf{3.}\mathbf{210}}\]
\[\textbf{а)}\ 4c + 25 + 4c + 27 =\]
\[= (4c + 4c) + (25 + 27) =\]
\[= 8c + 52\]
\[\textbf{б)}\ d + 47 + 6d + 18 =\]
\[= (d + 6d) + (47 + 18) =\]
\[= 7d + 65\ \]
\[\boxed{\mathbf{3.}\mathbf{210}}\]
\[\textbf{а)}\ 4c + 25 + 4c + 27 =\]
\[= (4c + 4c) + (25 + 27) =\]
\[= 8c + 52\]
\[\textbf{б)}\ d + 47 + 6d + 18 =\]
\[= (d + 6d) + (47 + 18) =\]
\[= 7d + 65\ \]