ГДЗ по математике 5 класс Мерзляк Задание 1130

\[\boxed{\ \mathbf{1130\ (1130)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ (x + 4,2) \cdot 0,6 = 19,2\]

\[x + 4,2 = 19,2\ :0,6\]

\[x = 32 - 4,2\]

\[x = 27,8.\]

\[2)\ (x - 9,4) \cdot 0,5 = 0,12\]

\[x - 9,4 = 0,12\ :0,5\]

\[x = 0,24 + 9,4\]

\[x = 9,64.\]

\[3)\ 12,3x + 7,9 = 12,82\]

\[12,3x = 12,82 - 7,9\]

\[x = 4,92\ :12,3\]

\[x = 0,4.\]

\[4)\ 20,04 - 2x = 9,1\]

\[2x = 20,04 - 9,1\]

\[x = 10,94\ :2\]

\[x = 5,47.\]

\[5)\ 0,4x + 3,8 = 20,5 \cdot 4\]

\[0,4x = 82 - 3,8\]

\[x = 78,2\ :0,4\]

\[x = 195,\ 5.\]