§ Задание 60
\[\boxed{\mathbf{4.}\mathbf{60}}\]
\[\textbf{а)}\ 9,8x - 10,1 - 4,5x = 0,5\]
\[5,3x = 0,5 + 10,1\]
\[5,3x = 10,6\]
\[x = 2.\]
\[\textbf{б)}\ 9,1z + 7,8 - 6,3z = 13,4\]
\[2,8z = 13,4 - 7,8\]
\[2,8z = 5,6\]
\[z = 2.\]
\[\boxed{\mathbf{4.}\mathbf{60}}\]
\[\textbf{а)}\ 9,8x - 10,1 - 4,5x = 0,5\]
\[5,3x = 0,5 + 10,1\]
\[5,3x = 10,6\]
\[x = 2.\]
\[\textbf{б)}\ 9,1z + 7,8 - 6,3z = 13,4\]
\[2,8z = 13,4 - 7,8\]
\[2,8z = 5,6\]
\[z = 2.\]