Determining Age of Universe Using Hubbles Constant

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The age of the universe can be estimated using Hubble's Constant, which describes the rate of expansion of the universe. If Hubble's Constant is assumed to be around 10 km/s/Mpc, calculations suggest the universe could be approximately 14 billion years old. A higher value, such as 20 km/s/Mpc, would imply a younger universe. The calculations involve using the inverse of the Hubble Constant to determine the time since the Big Bang. Understanding these concepts can help clarify the relationship between the expansion rate and the universe's age.
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Please can somebody explain how the age of the universe can be determined using Hubbles Constant?
If the constant is taken as 10km/s (just for the sake of easiness), how can this be figured out using calculations?

I appreciate any help!
 
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Thankyou for your help but what you gave me is a bit over my head.
"I have been given the task the Hubble constant is thought to be in the range 10 - 20 km/sec ^-1.
What age range does this imply for the universe?"
I am not sure where to begin...
 

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