D. -15
All I did was plug the numbers in
85 = 10x+15
70 = 10x
x = 7
180-85 = 95 = z
Answer:

Step-by-step explanation:
The total number of sums (not distinct) is
, because we're removing without replacement.
Count the sums that fit the stipulation (sum
5):
There are 8 sums that work. Therefore, the desired answer is 
Answer:
x<7
Step-by-step explanation:
65-8x>9
-8x>9-65
-8x>-56
x<7