Question

Review?
3x − 6y = 3
7x − 5y = −11

I need to find x, but I'm having trouble with negative integers.
10x + -1y = -7?

Answer 1

you would make the y values equal by multiplying them through to get to a LCM
3x − 6y = 3 -> 15x - 30y = 15
7x − 5y = −11 -> 42x - 30y = -66 now can you try? :)

Answer 2

okay, the -30y and-30y doesn't cancel out?
-66 + 15 = -51?
15x + 42 x = 57x
57x - 30 y = -51

Answer 3

mmm?
3x − 6y = 3 -> 15x - 30y = 15
7x − 5y = −11 -> 42x - 30y = -66
so
42x - 30y = -66
-15x + 30y = -15 that look better for you? :3

Answer 4

Hmm, y = -2
I need to combine these ;-;
10 x - 2 = -7?

Answer 5

It's really confusing to me

Answer 6

errr, what's your question?

Answer 7

is this 2 problems ?

Answer 8

It's a system of equations

Answer 9

with 3 equations ?

Answer 10

10x = -5
so
x = 2?

Answer 11

No, it's 2 equations

Answer 12

*-2

Answer 13

ummm could we back track a little?
42x - 30y = -66
-15x + 30y = -15

what did you get for this?

Answer 14

27x = -81

Answer 15

yep :) then divide both sides by 27 to get x

Answer 16

x = -3?

Answer 17

yep! :)
then plug in what you got for x back into one of the original equations to get y
so plug x= -3 into 3x − 6y = 3

Answer 18

3(-3) - 6(-2) = 3
-9 - (-12) = 3?

Answer 19

mmm don't plug anything else in for y?
3(-3) - 6y = 3 solve for y

Answer 20

oh wait, did you already get y? whoops, then ignore me :P

Answer 21

-9 - 6y = 3
+9 <- cancels
-6y = 12
y = -2?

Answer 22

You're such a life saver ;u; Kindness bless your heart~

Answer 23

glad I could help :) <3

Answer 24

♥