A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing

This Question is Closed

mjr632
 one year ago
Best ResponseYou've already chosen the best response.1Do you understand how to substitute?

mjr632
 one year ago
Best ResponseYou've already chosen the best response.1Okay, firstly, you want one equation as either Y or X by itself.

mjr632
 one year ago
Best ResponseYou've already chosen the best response.1If you do that part, i'll then explain the next step.

lovelycharm
 one year ago
Best ResponseYou've already chosen the best response.0okay wat the next step

mjr632
 one year ago
Best ResponseYou've already chosen the best response.1write the equation you've got for your isolated variable in here.

lovelycharm
 one year ago
Best ResponseYou've already chosen the best response.0dw:1360887641308:dw is that right how i solve for y

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0 7y +  7y is not zero and 4x + x is 5x

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0You need a variable to cross out when you add down. Try multiplying one of the equations by a certain number so that one variable crosses out when you add down.

lovelycharm
 one year ago
Best ResponseYou've already chosen the best response.0could u show me the step please @Rachel98

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0Okay, here is an example problem I'll draw it.

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0dw:1360888023089:dw

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0Now see how none of the variables cross off? So I'm going to try multiplying the first equation by  1 and see what happens.

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0dw:1360888146491:dw

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0Now see if you add straight down a variable crosses off when you add down.  y and y can also be put as  1y and 1y. Look at the numbers  1 + 1 = 0, so that crosses off.

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0dw:1360888346035:dw

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0Now all we have to do is divide both sides by  1, so undo the multiplication

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0dw:1360888489391:dw

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0So we have our x value, now what about y? What we do is we plug in the x value (substitute 8 for x) in one of the original equations. In this case the bottom equation is easier to do this.

lovelycharm
 one year ago
Best ResponseYou've already chosen the best response.0could u help me with my problem cuz i dont understand ur problem

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0dw:1360888601809:dw

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0See, in my problem how I multiplied one equation by  1? Try doing that with either one of your equations and then add down.

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0Remember, a negative * a negative is a positive.

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0dw:1360888933281:dw

Rachel98
 one year ago
Best ResponseYou've already chosen the best response.0Did you get it? Give it a try. I'll check your answer and if you make a mistake I'll work through it for you.
Ask your own question
Ask a QuestionFind 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.