Question

Which is not a solution to the equation -3x+y=5


A.
(–4, –7)

B.
(3, 14)

C.
(2, –1)

D.
(1, 8)

I picked C

Answer 1

plug in your options.

Answer 2

-3x + y = 5

(-4,-7) x = -4 and y = -7
-3(-4) + (-7) = 5
12 - 7 = 5
5 = 5 (this is correct, so it is not this one)

(3,14) x = 3 and y = 14
-3(3) + 14 = 5
-9 + 14 = 5
5 = 5 (correct, so not the right one)

(2,-1) x = 2 and y = -1
-3(2) + (-1) = 5
-6 - 1 = 5
-7 = 5 (BINGO..here it is)

(1,8) x = 1 and y = 8
-3(1) + 8 = 5
-3 + 8 = 5
5 = 5 (correct...not this one)

you got it right...answer is C