A community for students.
Here's the question you clicked on:
 0 viewing
sawq
 one year ago
Urgent! Will fan and medal!!
x + y = 27
4x + 1y = 45
Whats the solution to the equations and how did u get it?
I know about substitution and elimination but its not working out... Help...??
sawq
 one year ago
Urgent! Will fan and medal!! x + y = 27 4x + 1y = 45 Whats the solution to the equations and how did u get it? I know about substitution and elimination but its not working out... Help...??

This Question is Closed

pooja195
 one year ago
Best ResponseYou've already chosen the best response.0What would you like to use?

pooja195
 one year ago
Best ResponseYou've already chosen the best response.0Keep this in mind: OPPOSITES CANCEL whats the opposite of 4 ?

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2I second elimination method.. works best.

pooja195
 one year ago
Best ResponseYou've already chosen the best response.0\[4(x + y = 27)\] distribute

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2close but you forgot to distribute the 4 to the 27 what's 4 x 27?

pooja195
 one year ago
Best ResponseYou've already chosen the best response.0i accidently slipped in the 

pooja195
 one year ago
Best ResponseYou've already chosen the best response.04(x + y = 27) 4 * x = ? 4 * y = ? 4 * 27= ?

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2we are distributing the 4 all over the first equation.

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2and yes 4 x 27 is 108 :)

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2correct so your new first equation is 4x4y=108

pooja195
 one year ago
Best ResponseYou've already chosen the best response.0ill let doll finish :)

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2so now we have 4x4y=108 4x + 1y = 45

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2what do we need to do to get rid of the x?

sawq
 one year ago
Best ResponseYou've already chosen the best response.1lol @pooja195 thanks for ur help

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2umm .. not quite.. our goal is to eliminate a variable.

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.24x4y=108 4x + 1y = 45 so what do we need to do to get rid of this x?? we have 4x and 4x... maybe adding these equations together might work

sawq
 one year ago
Best ResponseYou've already chosen the best response.1ooh right so it would be: x  5y = 63?

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2hmm .... only the right hand side of the equation is correct

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2ok... let's think finance for a bit you bought pens for $4, you paid $4 4x+4x = ?

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.20x is fine... but 0 times x => 0

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2ok so we got rid of the x... now for the y we have 4y+1 it's like you are trying to buy pens for $4, but all you have is a dollar. How much more money do you need?

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2so now we have 3y=63

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2all we need to do is isolate y ... how do we do that?

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2in other words... we need y by itself.. no numbers no variables..

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2the second part is finding x.. luckily it's easier.. we just need to subsitute y = 21 in one of the original equations. I highly suggest the easier ones

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2so x =6 and y =21, but do these values work for the other equation. I know it does for the first equation because x+y=27 6+21=27 27=27

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.24x + 1y = 45 so plug in x = 6 and y =21

sawq
 one year ago
Best ResponseYou've already chosen the best response.14*6=24 1*21=21 21+24=45!!!

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2yes 21+24=45 45=45 so we have found our x and y values.

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2alternatively you can choose to eliminate the y first and solve for x

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2x + y = 27 4x + 1y = 45 xy=27 4x+y=45 3x = 18 x=6 6 + y = 27 6 6 y=21

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2^_^ I got the same values by eliminating the y first and my steps were shorter too.

sawq
 one year ago
Best ResponseYou've already chosen the best response.1Thanks a million @UsukiDoll you are the best!!!!! you really helped me

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.2I've noticed that through inspection I had two one y's so I figured if I make one of the y's negative I can solve this quickly.
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.