Question

x + 5y = -2
2x + y = 5

The point of intersection of the lines has a y-coordinate of _____.

Answer 1

would you like to solve by substitution or elimination?

Answer 2

Elimination

Answer 3

The options are -1 .. 1 .. 3

Answer 4

oke
multiply first equation by 2

Answer 5

ok one sec

Answer 6

pls don't leave lol

Answer 7

I wont :P

Answer 8

K. I got 2x + 10y = -4

Answer 9

subtract
2x+10y = -4
- 2x + y = 5
-----------------

Answer 10

How do I know when to subtract and when to add the equations?

Answer 11

or*

Answer 12

2x - 2x = ?
10y - y = ?
-4 - 5 = ?

Answer 13

Yeah... like how u said, subtract. If I added, my answer would be incorrect?

Answer 14

ye
subtracting = eliminating x because 2x - 2x = 0

Answer 15

Oh. Because my lesson says that you can add as long as you do it on both sides of the equation

Answer 16

Lol. This is confusing. But anyway, my answer was 1 :)

Answer 17

if u add in this case, none will be eliminated

Answer 18

Ohh. Yeah, you're right.

Answer 19

what grade are you in btw? I'm in 10th. And thanks for the help.

Answer 20

9th

Answer 21

and the answer is not 1 :P

Answer 22

Oh wow. Lol, I'm just learning this topic as we speak

Answer 23

but -4 +5 is 1

Answer 24

2x + 10y = -4
2x + y = 5

0x = 1

Answer 25

2x - 2x = 0
10y - y = 9y
-4 - 5 = -9

9y = -9

y = ?

Answer 26

ohhhh. -1 lol

Answer 27

ye :P

Answer 28

Great! Hopefully I understand the rest of my questions. Thankyouuuu

Answer 29

yw :)