I have homework and i dont understand it its called "Solving Systems of Equations by Elimination." The problem im stuck on is

8x+y=-16

-3x+y=-5

I need the answer and how to do it.

If you were to roll the dice one time what is the probability it will not land on 4?

Find the percent of each number. 17% of 200 books 35% of 80 letters

What x 4 = 30? do you guys know? i can't get it.?

Shen bought 6 CDs that were each the same prince. Including sales tax, he paid a total of $107.40. Of that total, $6.60 was tax. What was the price of each CD before tax?

Rewrite the expression 5 (6 + 9) as the sum of 30 and another whole number.

Martin went to foot locker and purchased a jersey for 59.79, a t-shirt for 11.49, and a hoodie for 49.99. He has a coupon for 25% off and will pay 6% in sales tax. What is martins total purchase

Alicia bough 3.8 pounds of cashews for 15.74 about how much was cost per pound

Solve the system by substitution: y=2x+2 y=3x a.) (3,9) b.) (1,4) c.) (-2,-4)

Meyer rolls two fair, ordinary dice with the numbers $1,2,3,4,5,6$ on their sides. what is the probability that at least one of the dice shows a square number?

Six more than five times a number is the same as nine less than twice the number. Find the number.