Решебник по математике 5 класс Виленкин Часть 1, 2 Часть 1. Параграф 3. Умножение и деление натуральных чисел Задание 211

\[\boxed{\mathbf{3.}\mathbf{211}}\]

\[\textbf{а)}\ 6x + 4x + 19 = 169\]

\[10x = 169 - 19\]

\[10x = 150\]

\[x = 150\ :10\]

\[x = 15.\]

\[\textbf{б)}\ 7y - 2y + 35 = 95\]

\[5y = 95 - 35\]

\[5y = 60\]

\[y = 60\ :5\]

\[y = 12.\]

\[\textbf{в)}\ 7z + 9z - 16 = 160\]

\[16z = 160 + 16\]

\[16z = 176\]

\[z = 176\ :16\]

\[z = 11.\]

\[\textbf{г)}\ 23m - 5m - 18 = 18\]

\[18m = 18 + 18\]

\[18m = 36\]

\[m = 36\ :18\]

\[m = 2.\]