Question

Use elimination to solve.
2x-3y=1
5x+4y=14

Answer 1

Well, first you would have to figure out which values x and y can both have but still be equal. Do you have any in mind yet?

Answer 2

2?

Answer 3

2 to take the place of x, or y?

Answer 4

X?

Answer 5

Yes, if 2 was to take the place of x, it would make sense and be equal to the answer put. If you used 2 for x, It would look like this:

(2*2) - 3y = 1
(5*2) + 4y = 14

Answer 6

So that would mean that y would have to be equal to 1.

Answer 7

Do you understand now? :)

Answer 8

2x - 3y = 1
5x + 4y = 14

2x2 - 3 = 1
2x5 + 4 = 14

Answer 9

How are they equal though ? It's 4-3y=1 and 10+4y=14

Answer 10

You are trying to find the values of x and y, correct?

Answer 11

Do x and y both have to be the same in your math problem that was assigned to you?

Answer 12

No I have to find an x and y that make the equations equal

Answer 13

You mean to find x and y values so that they equal the same answer?

Answer 14

Yeah exactly

Answer 15

Oh, ok. well, what have we found out so far? Do you have an exact answer that they need to end as, or are we just trying to find out one?

Answer 16

Fund as

Answer 17

Example, did your teacher, or whomever assigned this to you give you an answer that they both must end in? Or are you supposed to figure it out yourselves?

Answer 18

Just find an x and y power in each problem that equal 1 and 14

Answer 19

Ok, well I see that x should probably equal something bigger than 2 to make it a large enough number to be able to equal y.

Answer 20

Ok, so x and y have to both equal 14 as well as 1? in each problem?

Answer 21

Yeah like the first problem equals 1so the x and y need to help it equal one and 14 in the 2nd problem

Answer 22

ok, well, the second problem is 5x + 4 = 14, and we need to find out how to make it equal 1. So, we would have to use a negative number as x then.

Answer 23

X wouod equal 2

Answer 24

ok. but how would that equal to 1?
y would have to be a negative number.
Maybe y could be -2

Answer 25

That would equal positive 2, and there is no other possible way that we will be able to make it equal 1 unless we use a decimal, and that wouldn't even equal 1 exactly because it would equal somewhere around 1 as a decimal.

Answer 26

Are you sure it asks you to find how to make x and y values to equal both 1 and 14?

Answer 27

Do you know hoe to make those drawings one ere? I'll write it out

Answer 28

Ok

Answer 29

How do you do the writing ?

Answer 30

Click, the draw button below this box where you type in a 'comment'. There are 3 blue buttons, click where it says 'Draw'.