Question

Can someone please check my answer? It is an easy question. I will medal the person with the best answer. Thanks!

You want to get rid of the y by elimination in the system below.
x – 2y = -1
2x – 3y = 4
If you multiply the top equation by 6, by which number will you multiply the bottom equation?
4 or -3
-4
3 or -3
-4 or 3

I think it is -4.

Answer 1

@Hero

Answer 2

What what you get if you multiplied the top equation by 6?

Answer 3

Me personally, I wouldn't multiply the top equation by 6 to eliminate this, but hey, that's what the problem calls for.

Answer 4

6x - 12y = -6

Answer 5

I have already done the problem and I know how to do it. I was just checking to make sure I did it right.

Answer 6

Yes, you are correct. You multiply the second equation by -4 to eliminate y

Answer 7

Okay thanks! Would you mind checking one more problem?

Answer 8

As long as it's quick.

Answer 9

okay. here:What does x equal in the solution of the system of equations below?
X + 2y + z = 4
4y – 3z = 1
2y + 10z = 12

7
3
5
1

Answer 10

Divide both sides of the third equation by 2. What do you get?

Answer 11

1/2y + 5z = 6

Answer 12

sorry

Answer 13

y = -5z +6

Answer 14

Substitute the expression for y into the second equation of your system

Answer 15

So I found out that z = 1

Answer 16

and y =

Answer 17

1 too

Answer 18

Whatever you found, show the work you did to find it.

Answer 19

4(-5z+6)-3z=1

Answer 20

Show the steps as well

Answer 21

-20z+24-3z=1

Answer 22

I am showing you the steps now

Answer 23

Just type all the steps all at once.

Answer 24

4(-5z+6)=-3z=1
-20z+24-3z=1
-23z+24=1
z=1

Answer 25

y=-5(1)+6

Answer 26

y=1

Answer 27

Okay, that looks good. If you found y and z, then you should be able to find the value of x easily.

Answer 28

x+2(1)+1=4
x+3=4
x=1

Answer 29

I that correct?

Answer 30

Looks right

Answer 31

Thanks for you help!

Answer 32

looks good to me