It's a bit heavy on math, but includes nothing that's too confusing as long as you passed 8th grade algebra.

Spend 10 seconds, well maybe 20 for you, and type algebraic formulas and click on ALL the definitions until you understand.

Kind of like Algebra, you are solving for "X" which may be the bits of information you can't fine online.  

@Russell BrazilI guarantee you that teaching high school math in the inner city is not easier than doing algebra.

It'd be much like trying to teach your dog algebra.

It's a combination of Geometry and Algebra.

The key is that I'm making the offer on the property, so I will never offer more than what it's worth to me in my portfolio.With that in mind, my offer is an algebraic formula (from above)Cash Flow = (Rent + Other) - (Bills + Mortgage + Insurance + Savings)Cash Flow + Mortgage = (Rent + Other) - (Bills + Insurance + Savings)Mortgage = (Rent + Other) - (Bills + Insurance + Savings) - Cash FlowIf Mortgage Payment = L[c(1 + c)n]/[(1 + c)n - 1], L = Loan Amount, c = Monthly Interest Rate (divide interest rate by 12), n = Length of Loan (months)My offer amount would be:Offer = [(Rent + Other) - (Bills + Insurance + Savings) - Cash Flow] / [c(1 + c)n]/[(1 + c)n - 1]Is it pretty?

This also means you need to be extremely proficient on both Algebra and Geometry. 

There's always two camps: "I've got a spreadsheet for just the occasion", and "Great, now I have to admit that I DID use algebra as an adult!"

Geometry and Algebra