Question

Will someone help?
Choose the equivalent system of linear equations that will produce the same solution as the one given below.
6x + 2y = -6
3x - 4y = -18


12x + 4y = -12
15x = -30
8x + 4y = -4
14x = -10
6x - 8y = -36
-6y = -42
6x - y = -15
3y = 9

Answer 1

@DanJS

Answer 2

I have this question and then two others just like it.... I have been working on this assignment for a very long time and I would just like to get it done. Do you think you could help me finish? please..

Answer 3

For this one, Try multiplying the first equation by 2

Answer 4

you can multiply an equation through by a number on both sides, and it will not change the equation at all overall

Answer 5

6x + 2y = -6 Multiply everything by 2

12x + 4y = -12

Answer 6

6x + 2y = -6
12x +4y=
Like that...

Answer 7

yea, but you have to do it to both sides, so that the equation doesnt change

Answer 8

Well I forgot the -6 but

Answer 9

So 12x+4y=-12

Answer 10

12x + 4y = -12
3x - 4y = -18

Those are the two equations now right? i just put the second one back below the first

Answer 11

Now you need to add the two equations together

Answer 12

12x + 4y = -12
3x - 4y = -18
----------------
15x + 0y = -30

Answer 13

so you get

15x = -30

Answer 14

That is what they are looking for,

12x + 4y = -12 and 15x = -30

Answer 15

I have to go but I might be able to long on either later today or tomorrow. Can we just finish it later please? @DanJS

Answer 16

Log*

Answer 17

sure