Answer:
p =
Step-by-step explanation:
Given
9p + 7r = q ( subtract 7r from both sides )
9p = q - 7r ( isolate p by dividing both sides by 9 )
Answer: p = q - 7r ÷ 9
A is the answer to your problem
1-a-b-c
1 + (-a) + (-b) + (-c)