Final answer:
The value of p at which supply equals demand is $32.
Step-by-step explanation:
Using the given information, we have the equation:
2p - 22 = 170 - 4p
Combining like terms, we get:
6p = 192
Dividing both sides by 6, we find that:
p = 32
Therefore, the value of p at which supply equals demand is $32.