Question

I need help with solving systems?

Answer 1

would it be (-5,-3)?

Answer 2

@Psymon

Answer 3

oh okay cool thanks! can you help me with like 3 more? they're similar and I just wanna make sure i'm right.

Answer 4

yeah, let me know.

Answer 5

2x + 6y = -12
5x -5y = 10

First thing I notice is how each equation can be reduced. If I divide the whole top equation by 2 and the whole bottom equation by 5 I get

x + 3y = -6
x - y = 2

Ill now multiply the whole bottom equation by -1 so I can eliminate x-values

x + 3y = -6
-x + y = -2 add together

4y = -8
y = -2. Now Ill sub this back into the bottom equation

-x - 2 = -2
-x = 0
x = 0

So yougot it, good job :P

Answer 6

I cant believe I'm getting these right OMG. okay 2 more. What is the solution of the following system? I think this one is (-2,-1)

Answer 7

-3x -2y = -12
9x + 6y = -9

The bottom equation can be divided by 3 in order to reduce it. If Idivide the bottom by 3 I get

-3x - 2y = -12
3x + 2y = -3 Adding these togetherI get
0 + 0 = -15

No solutions.

Now you said you think its -2,-1. Well, you can ALWAYS test ^_^

If I plug (-2,-1) into thefirst equation I get

-3(-2) - 2(-1) = -12

6 + 2 = -12 ???

Not trueasyou can see:3

Answer 8

ohhh okay I get it. would this one be no solutions too?

Answer 9

Something = something else

no solution

something = same thing

infinite solutions.


So for you, you get 0 = 0, which means infinite : )

Answer 10

ohhh oh oh okay. for some reason I was thinking that since I just kept getting like 11/-11 for that it'd be no solutions. I had them mixed up haha. thank you soooo much it means a lot :)

Answer 11

yeah, np : )