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JessNicole
Group Title
Someone Please Help!
Solve a system of linear equations using substitution, elimination OR substitution!
3x  y = 137
y = 2x + 99
 2 years ago
 2 years ago
JessNicole Group Title
Someone Please Help! Solve a system of linear equations using substitution, elimination OR substitution! 3x  y = 137 y = 2x + 99
 2 years ago
 2 years ago

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allibear2012 Group TitleBest ResponseYou've already chosen the best response.0
what is x?
 2 years ago

irkiz Group TitleBest ResponseYou've already chosen the best response.1
3x  y = 137 ...........(1) y = 2x + 99 ..............(2) substitute (2) into (1) 3x (2x+99) = 137 try solving it now
 2 years ago

allibear2012 Group TitleBest ResponseYou've already chosen the best response.0
good reply!
 2 years ago

nubeer Group TitleBest ResponseYou've already chosen the best response.0
put your second equation in first one 3x ( 2x+99) = 137 find x now.
 2 years ago

JessNicole Group TitleBest ResponseYou've already chosen the best response.0
i got y = 23 for substituting. Now i have 2 more equations that i have to find for graphing and eliminating, can someone help me witht hose 2??
 2 years ago

allibear2012 Group TitleBest ResponseYou've already chosen the best response.0
i can try
 2 years ago

allibear2012 Group TitleBest ResponseYou've already chosen the best response.0
what r they?
 2 years ago

JessNicole Group TitleBest ResponseYou've already chosen the best response.0
THANK YOUU!! 2.) 2x + y = 1 x + 4y = 10 3.) 2x + y = 1 3x  y = 16 And i have to solve it by substituting and the other by graphing:\
 2 years ago

JessNicole Group TitleBest ResponseYou've already chosen the best response.0
sorry, i meant *eliminating* and graphing!
 2 years ago

allibear2012 Group TitleBest ResponseYou've already chosen the best response.0
ok mmmmmmmmhhhhhhhhhhhhhhhhhhh... i am not sure how much help that i will be since i am 10 years old :/
 2 years ago

JessNicole Group TitleBest ResponseYou've already chosen the best response.0
Oh myyyy haha, at least you know more than me. I'm 17! Your smart. But if you can just try? or start me off and i can try to figure out the rest by myself
 2 years ago

allibear2012 Group TitleBest ResponseYou've already chosen the best response.0
ok i will try... gtg sorry :((
 2 years ago

JessNicole Group TitleBest ResponseYou've already chosen the best response.0
kay, bye. thanks tho
 2 years ago

irkiz Group TitleBest ResponseYou've already chosen the best response.1
for 2) by elimination 2x+y=1...........(1) x+4y = 10.......(2) (2) x 2 2x+8y = 20......(3) (3) (1) 7y = 19 k solve it now
 2 years ago

JessNicole Group TitleBest ResponseYou've already chosen the best response.0
Wait, 2x + 8y = 20, i can't solve it no more, can i ? idk, i'm confused! how do you get (3)  (1) ?
 2 years ago

irkiz Group TitleBest ResponseYou've already chosen the best response.1
(3)  (1) as in equation (3)  equation(1) to eliminate the 2x which is common in both equations
 2 years ago

irkiz Group TitleBest ResponseYou've already chosen the best response.1
basically i manipulate (2) so that the x component looks like (1). I then label the manipulated (1) as a new equation (3). (3) and (1) have 2x. so if i take (3)  (1) i will eliminate the 2x and get left with 7y = 19
 2 years ago

irkiz Group TitleBest ResponseYou've already chosen the best response.1
2x + y = 1......(1) 2x + 8y = 20...(3) (3)  (1) 2x  2x +8y  y = 20  (1) 7y = 19
 2 years ago

JessNicole Group TitleBest ResponseYou've already chosen the best response.0
Ohh! okay okay, i understand.. so y = 2.714 ?
 2 years ago

JessNicole Group TitleBest ResponseYou've already chosen the best response.0
@irkiz thank you anyways
 2 years ago
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