Question

Solve by the substituion method. 2x - 7 = 12 and 8x + 60 = y. What is the solution of the equation as an ordered pair?

Answer 1

an soo... bunny is back!

Answer 2

FINALLY!

Answer 3

get first equation in terms of x

Answer 4

check your 1st eq.

Answer 5

Subtract 2x from both sides?

Answer 6

in your 1st eq there is no y.

Answer 7

oh crap...that is supposed to be 7y

Answer 8

-7y?

Answer 9

supposed to be 2x - 7y = 12

Answer 10

K. still get it in terms of x... or y...

Answer 11

try to find the ordered pair.
i got it. ;)

Answer 12

gand, she knws how ti solve it.

Answer 13

already? showoff!

Answer 14

lol, srsly.

Answer 15

want the answer?

Answer 16

YES

Answer 17

but no, i wont giv it.. try to solev it yourself.

Answer 18

solve*

Answer 19

Sorry dumbunny, thought u wanted to know how

Answer 20

I do

Answer 21

okay so for the first equation, I should subtract 8x from both sides?

Answer 22

no, I meant 2x from both sides

Answer 23

which variable u want 2 isolate?

Answer 24

I think y

Answer 25

why y?

Answer 26

JK.

Answer 27

K. then -2x is a very good start :)

Answer 28

so then would I have 7y = 12-2x

Answer 29

7y = 10x

Answer 30

-7y

Answer 31

why dont use elimination method>

Answer 32

and you can't combine the 12 and the 2x

Answer 33

so I am back to 7y = 12-2x

Answer 34

-7y=12x+2

Answer 35

What are ya'll doing? lol

Answer 36

I can't use the elimination method because it asks me to use the substitution method.

Answer 37

Isolating y when y is already isolated? o_O

Answer 38

divide each side by -7

Answer 39

Sj, spamming.

Answer 40

Oh, okay.. proceed.. @bunny.

Answer 41

LOL @sj

Answer 42

okay so I have 7y = 12 - 2x and I need to divide both sides by -7?

Answer 43

u have -7y=12-2x

Answer 44

and u divide each side by -7

Answer 45

OHHHH I see... Didn't see where she wrote it was supposed to be 7y ^_^

Answer 46

so I would then have y = 12-2x/-7...I think I am confused

Answer 47

y=12-2x
-----
-7

Answer 48

best option, help her on whiteboard.

Answer 49

really sorry bunny, but I got to get off. I think the others can help u

Answer 50

okay, thanks

Answer 51

come here Bunny:

http://www.twiddla.com/588961

Answer 52

dumbunny a better way to look at it that's easier (at least for me) is [y={12\over-7} -{2\over-7}x\]

Answer 53

Except if the equation actually worked...

Answer 54

\[y={12\over-7}-{2\over-7}x\]