Answer:
See below
Step-by-step explanation:
Question 1:
7p + 5c = p
7p = p - 5c
6p = -5c
[tex]c = -\frac{6}{5}p[/tex]
Question 2:
y = 19x + 19b
y - 19x = 19b
[tex]b = \frac{y-19x}{19}[/tex]