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icalibear
 one year ago
How to solve systems with elimination?
5x  2y = 28
20x + 8y = 100
I know that if there are two of the same variable then they cancel and then it is easy to solve when you add the equations together, but what if neither equation has corresponding variables???
icalibear
 one year ago
How to solve systems with elimination? 5x  2y = 28 20x + 8y = 100 I know that if there are two of the same variable then they cancel and then it is easy to solve when you add the equations together, but what if neither equation has corresponding variables???

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you have to make them become corresponding 5x2y= 28 (multiply by 8 ) = 80x16y =224

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1How are those corresponding :s

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and you have to make this for the second one 20x +8y=100 (muliply by 2) = 40x +16y = 200 and solve by elimination now

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1why did you multoply by 8 and 2 sorry

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3If I was given that problem I would eliminate x... seems easier if I distribute the 4 all over the first equation

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3and for that reason. I have to distribute the 4 all over the first equation because I want to eliminate a variable and solve for the other. In this case, 4(5x2y=28) 20x8y=112 (this is my new first equation) so I add my new first equation to the second equation so I can get rid of the x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0to make them corresponding...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Michele_Laino please help

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3oh geez we are forced to take the y's out and then solve for x because by distributing the 4 all over the first equation, I ended up destroying x and y., and we don't want that.

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3\[8(5x2y=28)\] \[2(20x+8y=100)\] \[40x16y=224\] \[40x+16y=200\] HUH? Am I reading this wrong? even I got the same problem.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i was right @icalibear

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1dw:1434862139806:dw

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3we are supposed to distribute 8 and 2 THROUGHOUT THE equation. We can't have it one sided

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1dw:1434862362988:dw

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3your x portion is off and when you fix it... x and y will cancel

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i made a mistake on the multiplication.. sorry

hartnn
 one year ago
Best ResponseYou've already chosen the best response.140x  40x = 0 16y +16y = 0 224 200 =24 so you get 0 = 24 in the end. Is that even possible?

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1is there even a solution if both x and y cancel because that leaves nothing

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3it's an inconsistent system which leads to no solutions at all

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1so there is no solution

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1right, so there is NO value of x or y which can satisfy those 2 equations. correct, no solution!

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1thanks so much guys.. i do not remember this from 9th grade..

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3yeah. I did it both ways... when I tried to eliminate x and I ended up with x and y going away similarly when I tried to eliminate y, I ended up and x and y going away as well leaving me with both situations having LHS doesn't equal the RHS left hand side doesn't equation the right hand side.

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3but I still would've done the x first... multiply that first equation by 4 makes it faster to get to the conclusion

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3\[4(5x2y=28)\] \[20x+8y=100\] \[20x8y=112\] \[20x+8y=100\] adding these two equations forces x and y to disappear.

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1I multiplied to get the middle terms the same but then i got a fraction

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1Nevermind made an error ! 6 x 3 is 18

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1dw:1434862940828:dw

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1is this set up right

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3yay... that was fast x)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1yes, she got it, she is now unstoppable! ;)

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1I didnt need to find y for the question but i know you would substitute it back in

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1thanks so much guys :)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1right, go ahead and find it...you're doing it to learn, right? not just for completing the homework...

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1yes this is just practice

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3practice is fine....it's the questions with so many questions and multiple choices with omg this is due in an hour are frown upon on os

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1this isnt a class i get credit for, its just summer prep so i can get into math 128 in the fall

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1ive graduated and I forgot every bit of this intermediate algebra!

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.3actually... well in my textbook... this is elementary algebra 1

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1either way, I need a refresher

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1waiting for the y value :P

icalibear
 one year ago
Best ResponseYou've already chosen the best response.1sorry i have moved way on.. D:

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1its ok ^_^ probably next time :)
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