Answer:
C.
Step-by-step explanation:
It's c because you need the sum of x and 10 but both multiplied by 2. So it wouldn't be A nor B because they are both subtracting. That would leave you with C and D and d doesn't have anything to do with multiplying. I dunno made sense to me.
Answer: x=1
Trust me ;)
70.3
16.872/.24= 70.3
-19 -12
-(19+12)
- 31