6x+6y=6 -6x+3y=-12 solving system of equations by elimination

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

You work for a lender that requires a 20% down payment and uses the standard depth to income ratio to determine a person‘s a little eligibility for a home loan of the following choose the person that you would rate the highest on their eligibility for a home loan

Arational number that is equivalent to -20/4?