Question

Decide whether the given ordered pair is a solution of the given system.
X - Y= 17
; (8,9)
X + Y=-1

Answer 1

Plug in the values and see if they satisfy both equations.

Answer 2

x - y = 17
x + y = -1

(x, y)

8 - 9 = 17
8 + 9 = -1

See if those equations are true.

Answer 3

Just simplify the left side of the equal sign and see if it is equal to the right side of the equal sign.