Question

Given equations A and B as 2/3x + 3/5y=12 and 5/2y - 3x=6 respectively, which expression will eliminate the variable y?

Answer 1

I dont think i understand, can you explain alittle more about "eliminating the variable y"? Are you talking about isolating?

Answer 2

Yes

Answer 3

Oh. Ok. So you have two equations. Have you tried to isolate y on both? I have done some math, and the second equation seems much easier to isolate. But if you are truly wanting to isolate y, both equations will do. So Im not sure what you are finding.

Answer 4

A. 5/3a + 2/5b
B. 5/3 a-b
C. A - 2/5b
D. 5/3a - 2/5b
E. 25/15a + 6/15b

Answer 5

I'm sorry. I don't think I get what the equation is asking. I thought the equations were named A and B. I thought it was not included in the answer.

Answer 6

Ohh

Answer 7

If you'd like, do you mind copying and pasting the whole problem or do a screenshot? That way I can see the problem.

Answer 8

Ok

Answer 9

You understand it now?

Answer 10

Yes. This is basically you plug in the whole equation and times it by those fractions and see which one cancels the y into 1.

Answer 11

Can you please tell me the answer?

Answer 12

Ok. So I believe D is the correct answer. Because when you times equationA by 5/3 you get a positive y. And when you times 2/5 by equationB you also get a positive y. But you are subtracting equationA by equationB. Therefore y-y=0

Answer 13

Thanks c:

Answer 14

No problem, May I ask did you get it right?

Answer 15

I dont know until i finish the whole test.

Answer 16

Okay. Glad I helped.