Question

Solve the system using elimination.

y – x = 13
7y + x = 11


(–10, 16)


(–10, 3)


(3, 16)


(–3, –10)

Answer 1

(-10, 3)

Explanation:

Y - X = 13

7Y + X = 11

(Y+7Y) + (-X+X) = 13+11

8Y = 24

Y = 3

Solving for X:

Y - X = 13

Substitute Y=3

3 - X = 13

-X = 13-3

-X = 10

Multiply by - 1,

X = - 10

(-10, 3)