Pablo took out an 80/20 mortgage to buy a house that cost $140,000. The first (80%) mortgage has an interest rate of 4.75%, and the second (20%) mortgage has an interest rate of 7.525%. Both the first mortgage and the second mortgage are 30-year fixed-rate mortgages. What is the total monthly mortgage payment for the house?

$780.50

Step-by-step explanation:

I will update this if I figure how it's solved as well.

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative