Answer:
23
Step-by-step explanation: Substitute 1 for p & 7 for q
7 − 5p + 3q
7 - 5(1) + 3(7)
7 - 5 + 21
7 + 16
Hope this helps you!!! :)
7-5(1)+3(7)
7-5+21
2+21
The answer is 23
Hope I helped!
