For this case we must find the value of "b" of the following equation:
[tex]\frac {3} {2} + b = \frac {7} {4}[/tex]
Then, we subtract [tex]\frac {3} {2}[/tex] from both sides of the equation:
[tex]\frac {3} {2} - \frac {3} {2} + b = \frac {7} {4} - \frac {3} {2}\\b = \frac {7} {4} - \frac {3} {2}\\b = \frac {14-12} {8}\\b = \frac {2} {8}\\b=\frac{1}{4}[/tex]
Answer:
[tex]b = \frac {1} {4}[/tex]
