Question

Which is a solution to the equation 5x – y = –3?

A.
(2, –7)

B.
(1, 2)

C.
(–2, 7)

D.
(–2, –7)

Answer 1

time to sub
5x - y = -3

(2,-7)...x = 2 and y = -7
5(2) - (-7) = -3
10 + 7 = 3
17 = 3 (not this one)

(1,2)..x = 1 and y = 2
5(1) - 2 = -3
5 - 2 = -3
3 = -3 (nope...not this one)

(-2,7)..x = -2 and y = 7
5(-2) - 7 = -3
-10 - 7 = -3
-17 = -3 (nope)

(-2,-7)...x = -2 and y = -7
5(-2) - (-7) = -3
-10 + 7 = -3
-3 = -3 (BINGO...it would have to be the last one I tried..lol)