How do i do it and how would i show my work

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

Your client has saved $1,860 for a down payment on a house. a government loan program requires a down payment equal to 3% of the loan amount. what is the largest loan amount that your client could receive with this program

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl