Question

PLEASE AM BEGGINNN YOUUUUU

Answer 1

Explanation:

A)

A - the population after its decrease

x - the number of years in which there has been a decrease in population

Hence,

`\displaystyle\\A=30000-475x\\A+475x=30000-475x+475x\\A+475x=30000\\A+475x-A=30000-A\\475x=30000-A`

Divide both parts of the equation by 475:

`\displaystyle\\x=(30000-A)/(475)`

B)

`\displaystyle\\x=(30000-24300)/(475) \\\\x=(5700)/(475)\\\\x=(12*475)/(475) \\\\x=12\ years`