Answer:
8
Step-by-step explanation:
20-7=13
13^1.50=8.66666666667
Round up with 8 or 9
the solution for x is x=40
-5c+5c+2c–6c–16=c
-16c - 16=c
-16 = c + 16c
-16 = 17c
-16/17 = c