Решебник по математике 5 класс Виленкин Часть 1, 2 Часть 2. Параграф 6. Десятичные дроби Задание 251

\[\boxed{\text{6.251.}}\]

\[\textbf{а)}\ 4x + 7x = 1,98\]

\[11x = 1,98\]

\[x = 1,98\ :11\]

\[x = 0,18.\ \]

\[Ответ:0,18.\ \]

\[\textbf{б)}\ 9z - 5z = 5,52\]

\[4z = 5,52\]

\[z = 5,52\ :4\]

\[z = 1,38.\ \]

\[Ответ:1,38.\ \]

\[\textbf{в)}\ 2t + 5t + 3,18 = 25,3\]

\[7t = 25,3 - 3,18\]

\[7t = 22,12\]

\[t = 22,12\ :7\]

\[t = 3,16.\ \]

\[Ответ:3,16.\ \]

\[\textbf{г)}\ 8p - 2p - 14,21 = 75,19\]

\[6p = 75,19 + 14,21\]

\[6p = 89,4\]

\[p = 89,4\ :6\]

\[p = 14,9.\ \]

\[Ответ:14,9.\]