Step-by-step explanation:
6-3=3
T1=3+3=6 +3=9 +3=12 +3=15 +3=18
n=18
Answer:
where is the question?
answer below
7.) 15-8= 7
8+7=1
8.) 17-9=8
9+8= 17
9.) 16-7 =9
