Answer: x = H(x) + 3
Step-by-step explanation: The inverse function is x expressed with H(x). There aren't always inverse functions but in this case you just put the fraction from the right hand side to the left hand side. After the divison you get what I wrote.
Collect like terms
15 + 3 + 9x + 7x = y
18 + 16x = y
Recall
b + mx = y
m = 16
b = 18
Subtract 108 from 20 then you will get the answer or if that doesn’t work then add it or if that doesn’t work multiply it
The car is going 180 kph. In three hours the car would travel 540 kilometers. Hope this helps.