Question

Do these equations have solutions?
2d−e=7
d+e=5

Answer 1

You have two equations and two unknowns, so yes.

Answer 2

Are they unknown? or Is there a infinite amount of solutions??

Answer 3

I need an explanation.

Answer 4

Do you know how to solve a system of equations?

Answer 5

I kinda know but I'm still a bit confused

Answer 6

And yes there is options

Answer 7

add them all together. One venerable will cancel out, then solve for the other.

Answer 8

These are the options + the one I chose

Answer 9

Do I add these together or??

Answer 10

yes

Answer 11

So I'm adding the numbers and letters together...right??

Answer 12

yes

Answer 13

add straight down

Answer 14

It doesn't make any sense though?

Answer 15

how much is 2d+1d?

Answer 16

3

Answer 17

what happened to the d's?

Answer 18

I'm greatly confused as of right now.

Answer 19

how much is 2d+1d?
add the d's
we are talking d's not just numbers

Answer 20

How many d's are there?
you can not omit the letter d
we are adding d's

Answer 21

I'm confused because, I don't see how adding a d is going to explain if the solution is either infinite,no solution,or that the fact that there is a solution.

Answer 22

Trust me. Add the d's

Answer 23

If you add the d's I will help you. If you are not interested, then I will leave. Let me know

Answer 24

@mthompson440 I still don't get the point of adding the d's. It makes no sense

Answer 25

you need to solve the system of equations. To do this the first step is adding the d's.

Answer 26

Here is what I got

Answer 27

\[2*4-1=7\]
\[4+1=5\]
Unless you want me to add 4 and 4 ?

Answer 28

If that is what you are trying to say

Answer 29

Your answer is correct. How did you get it?
Were you able to solve for d and e or was this just substitution?

Answer 30

It was asking to use linear combination method to see if there was a solution

Answer 31

I got confused at adding the d's mainly because, I was taught a easier route to get a solution. And also this is the full question.