\[4x - 2b = 5\]
\[4x = 5 + 2b\]
\[x = \frac{5 + 2b}{4}.\]
\[1 < \frac{5 + 2b}{4} < 3\]
\[4 < 5 + 2b < 12\]
\[- 1 < 2b < 7\]
\[- 0,5 < b < 3,5.\]