Question

Solve the system of equations by the addition method.

x+y=-12
x-y=-12

Answer 1

If x + y = 12, and x - y = -12, y needs to be zero, correct? That would mean x is -12...

Am I missing something here? Is there more information to this question?

Answer 2

they both equal to -12.

Answer 3

That's the only information/instructions.

Answer 4

With that being said, x = -12, and y = 0, but that's way too easy. There must be something I'm missing.

Answer 5

its a multiple choice question.. o:

Answer 6

What are the options?

Answer 7

(0, 12)

(12, 0)

(0, -12)

(-12, 0)

Answer 8

Could you like show the step by step process of the work? O:

Answer 9

(x + y) & (x - y) = -12
y, as aforementioned, has to be zero, for the outcome remains the same if both subtracted and added.
(x + 0) & (x - 0) = -12

For addition:
x + y = -12
-12 - y = x
-12 - 0 = x
-12 - 0 = -12
-12 = x

For subtraction, flip the signs.

Answer 10

oh. I understand. Thank you ^^;;

Answer 11

No problem. Any other questions you need help with?

Answer 12

Most of the questions on this quiz I am taking on blackboard is all related with systematic equations. . .

Answer 13

I can help.

Answer 14

8x+4y=-8
-2x-4y=-28

Answer 15

Multiple choice answers:

(4, -10)

(8, -10)

(-6, 10)

infinite number of solutions

Answer 16

I just want to learn how to approach this type of problem.

Answer 17

4y is a shared sequence, so finding that in one equation can potentially solve both... I'm working on it.

Answer 18

ok o :