Answer:
Step-by-step explanation:
let one charge=x
second charge=135-x
20x+(135-x)5=1800
4 x+135-x=360
3x=360-135=225
x=75 $
first charges $ 75 for 20 hours
second charges =135-75=$60 for 5 hours.
A. quotient of Powers
hope it helps
Answer:8+x-7+8x+17
9x=18
X=2