Lets say we have this following scenario:
1000000 = 1000 * (1/r) * [1-(1/(1+r)^43)],
where PV=1000000, n=43, C=1000, r=?
We have to find "r", so how do we manually go about finding "r"? I know "r" can be found by using a financial calculator but I am interested in knowing how it can be calculated manually as such stuff is not taught our class.