A community for students.
Here's the question you clicked on:
 0 viewing
 2 years ago
Use substitution to solve the problem...
x=9y
x+4=5(y+4)
I already now that you can plug x in to the second equation and then distribute but what next?
 2 years ago
Use substitution to solve the problem... x=9y x+4=5(y+4) I already now that you can plug x in to the second equation and then distribute but what next?

This Question is Closed

zepdrix
 2 years ago
Best ResponseYou've already chosen the best response.1\[\large \color{orangered}{x=9y}\]\[\large \color{orangered}{x}+4=5(y+4) \qquad \rightarrow \qquad \color{orangered}{9y}+4=5(y+4)\]Distributing gives us,\[\large 9y+4=5y+20\]So you've gotten this much done so far? Hmm ok. Subtract 5y from each side,\[9y5y+4=\cancel{5y5y}+20\]

zepdrix
 2 years ago
Best ResponseYou've already chosen the best response.1\[\large 4y+4=20\]Subtract 4 from each side,\[4y+\cancel{44}=204\]

zepdrix
 2 years ago
Best ResponseYou've already chosen the best response.1Understand the process of combining like terms? :D That's how the 9y and 5y combined.

mathstudent55
 2 years ago
Best ResponseYou've already chosen the best response.0You already have the first equation solved for x. So plug in what x is equal to, 9y, into the second equation and solve for y.

brookester6
 2 years ago
Best ResponseYou've already chosen the best response.0yea, now y = 4 and i plug it in to the top equation :) Thanks so much!!
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.