8000=4000(1+r)

Solution for 8000=4000(1+r) equation:

8000=4000(1+r)

We move all terms to the left:

8000-(4000(1+r))=0

We add all the numbers together, and all the variables

-(4000(r+1))+8000=0


We calculate terms in parentheses: -(4000(r+1)), so:

4000(r+1)

We multiply parentheses

4000r+4000

Back to the equation:

-(4000r+4000)


We get rid of parentheses

-4000r-4000+8000=0

We add all the numbers together, and all the variables

-4000r+4000=0

We move all terms containing r to the left, all other terms to the right

-4000r=-4000

r=-4000/-4000

r=1