Question

What is the solution to the system of equations?

http://static.k12.com/bank_packages/files/media/mathml_806d916af8f47b8c2a984544c4c1cae0762662bf_1.gif

( ? , ? )

Answer 1

@DanJS

Answer 2

hi

Answer 3

Hi could you help me on a few questions?

Answer 4

x + y = 5

x - 2y = 2

Answer 5

Yeah

Answer 6

solve equation 1 for x =

Answer 7

What would i do to do that?

Answer 8

x + y = 5 ---> y = 5 - x

see that so far?

Answer 9

Yeah

Answer 10

so y = 5-x , put that into equation 2,

x - 2y = 2 ----> x - 2(5-x) = 2

Answer 11

x - 10 + 2x = 2

Answer 12

3x = 12

x = 4

Answer 13

use x = 4 in one of the original equations and find out what Y is..

Answer 14

Ok

Answer 15

so as of now we have (4,?) right?

Answer 16

yes, use that information in one of the first original equations, and find Y

Answer 17

And i would have x-2*4=2 right?

Answer 18

close, you put in y=2, we have x so far and need to find the Y

Answer 19

4 - 2*y = 2

Answer 20

Ok so is 2 y?

Answer 21

yes

Answer 22

Ok so (4,2)?

Answer 23

Could you help on a few more?

Answer 24

you can test it out in any of the equations from the question,

if x=4 and y=2

does the equation have the same number on both sides?

Answer 25

Yes

Answer 26

wait, y=1 not 2

Answer 27

Or i think it does

Answer 28

4 - 2*y = 2

Answer 29

2y=2 ---> y =1

Answer 30

(x,y) = (4,1)

Answer 31

Okay could you help on 4 more?

Answer 32

yeah , open a new question thread and type @DanJS