I’ll give the brainliest whoever helps me

Solve: 3x+y=6 4x-2y=18 show all work !

Graph the equationy= x+3[tex]y = x + 3[/tex]

Pamela has a 30-year, 5.75% mortgage on her $250,000 home. she has been paying on it for 5 years, and has recently hit some financial trouble. if her lender agreed to lower the interest rate on her $231,905.47 balance to 5.5%, what will her new payment be for the remainder of the loan?