A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
solving systems using substitution
x=y
x+2y=3
anonymous
 5 years ago
solving systems using substitution x=y x+2y=3

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so to solve by substitution, you replace one of the variables in a second equation with the value for that same variable in the first equation. This replacement is called substitution.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so in your example, we want to replace the x in the second equation, with the value of "x" in the first  i.e. subsitute for x in the second equation

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so instead of x + 2y =3, we use "x=1" in the first equation to replace the "x" with "y" 1. x + 2y = 3, and given x=y 2. (y) + 2y = 3 3. 3y = 3 4. y = 1

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0in general, all substitution problems come down to "isolating" a variable in one of the given equations (getting it by itself  in this problem it's already started that way with x=y), and then using that value in place of the same variable in another equation. replacement = subsitution

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh ok im staring to get it now

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Thank you!!!!! you really helped

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok np, post more problems if you want to work through another one!
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.