Question

x-2y=2
x+3y=17

Answer 1

what do exactly need?

Answer 2

Solve x and y. :D
Ready to work on this together, lauran?

Answer 3

LOL! r u sure??

Answer 4

if i were to use the substitution method to solve the following system im suppose to choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation

Answer 5

Awesome. Let's do this!

Answer 6

lol.

Answer 7

Equation 1 x-2y=2
Equation 2 x+3y=17

Answer 8

Equation 1 x-2y=2
x = 2y + 2

Make sense so far?

Answer 9

um well i fail when it comes to math so I might sound really stupid but i'm not

Answer 10

3 and 8

Answer 11

x = 8
y = 3

Answer 12

Don't worry about it, Laura! We're going to figure this out together. :D I'll check during every step to see if you understand. It's more important that we learn it than to just get answers from a calculator.

Answer 13

Did that first step make sense, Lauran?

Answer 14

@vijay, that isnt the ordered pair.

Answer 15

yea..
now what do i do

Answer 16

Ok, so when we got x = 2y + 2, this means "anytime you see an x in another equation, we can plug in "2y + 2" to replace x. Does this make sense?

Answer 17

hmm, it should be in other way

Answer 18

can u give me the anwser lol there is no way i am gonna figure this out

Answer 19

LauraN: They gave you the answer, but you'll fail the test if we don't work on this together :/

Answer 20

hmm.

Answer 21

wait is the anwser x+3(2y+2)=17

Answer 22

Just tell me: does it make sense that when I said, "Ok, so when we got x = 2y + 2, this means "anytime you see an x in another equation, we can plug in "2y + 2" to replace x. Does this make sense?"

Answer 23

No, wait, I said yes too soon. Lol.

Answer 24

x+3y=17 is equation 2.
Remember when we said x = 2y + 2?

Answer 25

multiply the first equation with 3 and second equation with 2 and add both of the equations.
you will get,
5x =40
x=8
now substitute x in one of the equation
8-2y =2
-2y=2-8
y=-6/-2
y-3

Answer 26

is x+3(-2y+2)=17

Answer 27

(2y + 2) + 3y = 17

Answer 28

*y=3

Answer 29

The (2y + 2) equals x according to the first steps that we did.
So, we literally just erase x in equation two and replace it with (2y + 2)

Answer 30

So, just a rehash of what we did:
equation 1: x-2y=2
equation 2: x+3y=17

Equation 1 was changed to
x = 2y + 2 by moving the -2y to the right.

Then, because we know x = (2y + 2) from the step above, we can change equation 2 from x+3y=17 to (2y + 2) + 3y = 17

Answer 31

Did this make sense, Laura?