Question

Solve the following system using the substitution method:
6x - 2y = -4
y = 3x + 2

Answer 1

http://openstudy.com/study#/updates/50f97f9ee4b007c4a2ec1b2c

Answer 2

but how would I go about it in this case?

Answer 3

what would the solution be like?

Answer 4

In this case, substitute the expression 3x + 2 into the first equation to get:
6x - 2(3x + 2) = -4

Then simplify and isolate x. Afterwards, find the value of y.

Answer 5

thx but look here: http://www.wolframalpha.com/input/?i=6x+-+2%283x+%2B+2%29+%3D+-4

Answer 6

is it Inconsistent? Dependent? or are the coordinates? what would the answer be like?
thx so much!

Answer 7

Actually, the first thing I usually do before using any method is to simplify equations when necessary. We can simplify the first equation. When we do that we get:

3x - y = 2

That can be manipulated to get
3x + 2 = y

Which so happens to be the same line as the second equation. So no need to use substitution method since both equations are actually the same.

Answer 8

so which coordinate would that be? or would it be Inconsistent or
Dependent? thx by the way for your time. :D

Answer 9

Keywords: "since both equations are actually the same. "

Answer 10

so Inconsistent or
Dependent?

Answer 11

Inconsistent is like...
x+y = 1
and x + y =5

Dependent is like...
x+y = 1
2x + 2y= 2

Any guess?

Answer 12

Nope I'm bricked... :( Can you PLEASE provide the response! :(

Answer 13

what's the graphing lines? what's the coordinates?
or is it dependent? or inconsistent?

Answer 14

Look here: