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

1. Hero
2. dumbsearch

but how would I go about it in this case?

3. dumbsearch

what would the solution be like?

4. Hero

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.

5. dumbsearch

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

6. dumbsearch

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

7. Hero

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.

8. dumbsearch

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

9. Callisto

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

10. dumbsearch

so Inconsistent or Dependent?

11. Callisto

Inconsistent is like... x+y = 1 and x + y =5 Dependent is like... x+y = 1 2x + 2y= 2 Any guess?

12. dumbsearch

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

13. dumbsearch2

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

14. dumbsearch2

Look here: