To solve this problem we can use proportion, but first its nice to transform our fraction into improper fraction, so

and

Now we can make proportion

--------------------------

of fuel
x-----------------------------

Now we can cross multiply

- its the result
Answer:
The two objects are similar because of their gcf
Q4) x+4 = 15
15-4 = x
x = 11
Q5)
18 + 12 = x
x - 12 = 18
30 - 12 = 18
x = 30
I hope this helped, please give this the Brainliest answer! :3