Question

Solve this system of equations using any method.



4x – y = 5
x + y = 10


Answer choices

(–1, –9)


(3, 7)

(5, 5)

(4, 6)

Answer 1

@dolphin1998 @imqwerty

Answer 2

what do you get if you add the equations?

Answer 3

without using the x and all tht just the numbers? @pgpilot326

Answer 4

no, including the x and y... left + left = right + right. try that and see what results.

Answer 5

@pgpilot326 that is confusing, explain

Answer 6

what is left side of the first equation?

Answer 7

4x

Answer 8

the whole left side

Answer 9

4x-y

Answer 10

now add to it the whole left side of the second equation

Answer 11

x+y u can't

Answer 12

@pgpilot326

Answer 13

I think its (5,5)

Answer 14

@dolphin1998 I was thinking that but it's confusing... :/

Answer 15

you can combine like terms... please stop resisting and open your mind

Answer 16

@pgpilot326 I am not resisting I am confused because I have no idea how to do Algebra work

Answer 17

pgpilot326 she is confused. Please show some respect

Answer 18

i would say its (5,5)

Answer 19

@dolphin1998 thank you! that's what I'm thinking

Answer 20

4x - y + (x + y) = 5 + 10

this simplifies to

4x + x -y + y = 15

and again

5x = 15

can you solve this?

Answer 21

Your welcome

Answer 22

No its (3,7)

Answer 23

@dolphin1998 (3,7)

Answer 24

Yay

Answer 25

why do you only care about the answer and not how to solve? and @dolphin1998 how are you helping this person learn?

Answer 26

@dolphin1998 she has done this before, but I am sure it is correct because it doesn't look as if any others fit

Answer 27

She is my friend. Thanks for the concern. I am not a mean person so don't be mean to me. She probably knows how to she just doesn't get it

Answer 28

i'm not being, just pointing out that what is going on here doesn't lead to learning.

Answer 29

good luck

Answer 30

@dolphin1998 exactly I am confused because I can't understand how we get these answers and all. @pgpilot326 ok

Answer 31

ok

Answer 32

@dolphin1998 I just thought up of how to find it. I can email my teacher mrs. hansen to see if she can help me understand it.

Answer 33

That is a great Idea. Thats what I do

Answer 34

@dolphin1998 I will let you know what happens next.

Answer 35

okay good luck

Answer 36

3x+y = 5 -------> y = 5-3x
4x - 7y = -10
-----------------
4x - 7(5-3x) = -10
4x -35 + 21x = -10
4x + 21x = -10 + 35
25x = 25
x = 1 ------------> y = 5-3 = 2
https://answers.yahoo.com/question/index?qid=20100919160444AA6cYqO

Answer 37

@Th3B3ast16 thank you!