Question

Which is a solution to the equation 6x + y = –4?









A.
(2, 8)







B.

(1, –10)








C.

(2, –8)








D.
(1, 2)

Answer 1

Isolate y, and give those values and you will see

Answer 2

Okay see @Shay17 , if I want to find if a set of values of (x,y) are the solution of some equation say f(x,y) = 0, then I just plugin the values of x and y in LHS and evaluate the value. If value in LHS = RHS, then that set of values is a solution.

Answer 3

For example, lets take the option A, okay ?

Answer 4

Now, I am going to put x = 2 and y = 8 in LHS i.e. 6x + y. Can you tell me what do you get ?

Answer 5

@Shay17 you there ?

Answer 6

yea whats up

Answer 7

Well I was asking that can you calculate the value of
6x+y when x = 2 and y = 8

Answer 8

20

Answer 9

Great work

Now is 20 (the value you obtained from LHS) equal to -4 (the value in RHS). If yes, then A is a solution if not then no.

Answer 10

So, is (2,8) a solution ?

Answer 11

no

Answer 12

@ikatouni , I was asking this question to you.

Sorry @Shay17 , I thought you asked the question

Answer 13

Well that's pretty right. So, A is not the correct answer. Try using the same method for other options @ikatouni

Answer 14

It's B

Answer 15

I agree.

Answer 16

Yea @ikatouni asked this same question earlier though I thought I answered

Answer 17

so its 1,-10

Answer 18

I said B so yea