Question

can someone please help me answer this question? I could really use some help...
Question~
Solve the systems using the elimination method.
y = 2x
x + y = 3

Answer 1

Abby I'd say the first thing to do would be to put the first equation into proper form.

Answer 2

what do you mean?

Answer 3

Okay I'll help you with that.
Basically when you are solving for 2 unknowns you want both equations set up similarly.
So, we'll take y = 2x
and change it to
-2x + y -0

Answer 4

Sorry -2x + y = 0

Answer 5

X=1 and y=2 I plugged in random numbers and see if they worked and these did...:))

Answer 6

Oh just kidding no they don't hold on

Answer 7

Sydney - just picking and choosing MIGHT work sometimes but not always

Answer 8

I always do... And I have an a... I've never actually missed one of these questions, sometimes it takes forever tho

Answer 9

@wolf1728 could you show me the steps to answer this question? please?

Answer 10

Yes, but I expect you to type some things every now and then

Answer 11

Okay we now have the two equations
-2x + y = 0
x + y = 3

Answer 12

yes sir/ma'am ofc! Thank you very much!

Answer 13

Multiply the 2nd equation by 3(or would it be 2?) so that the y’s have opposite coefficients?

Answer 14

I'm sorry
We should multiply the first equation by -1 then we have
2x - y = 0
x + y = 3
Now it's time to add the 2 equations.

Answer 15

Adding those we have 2x plus x = ?

Answer 16

abby 2x + x = ?

Answer 17

0? I'm sorry it takes me a minute to figure it out...

Answer 18

abby I'm just asking what is 2x + x

Answer 19

what do you mean? do you want to know what it equals?

Answer 20

Yes abby what is 2x + x?

Answer 21

0?

Answer 22

No
If you have two x's and 1 x how many x'sdo you have?

Answer 23

2?

Answer 24

Basically what is 2+1?

Answer 25

3

Answer 26

Okay
So we are in the process of adding the 2 equations
2x - y = 0
x + y = 3

2x + x = 3x

-y + y = 0

and 3 +0 =3

So, we now have
3x = 3
What does x equal?

Answer 27

What times 3 equals 3?

Answer 28

1

Answer 29

Yes so x =1

To solve for y, let's use equation 2

x + y = 3

We know x = 1
So, 1 + y = 3
What is y?

Answer 30

2?

Answer 31

Yes, so now you know x =1 and y = 2

Answer 32

oh ok and that's the answer to the question?

Answer 33

Yes, that is the answer

Answer 34

ok great! thank you soo much @wolf1728 you're awesome! I'm going to write out the steps... would you mind looking at them after I wright them out to make sure I did it right?

Answer 35

I must get going now

Answer 36

ok well thank you!!