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krissywatts
Group Title
ues substition method to fin solution sets:
I need step by step help
2a+4b=24
a=202b
 one year ago
 one year ago
krissywatts Group Title
ues substition method to fin solution sets: I need step by step help 2a+4b=24 a=202b
 one year ago
 one year ago

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mathstudent55 Group TitleBest ResponseYou've already chosen the best response.0
In the substitution method, you first need to solve one equation for one variable. In this case, that step is already done because the second equation shows what a is equal to. In other words, the second equation is already soved for a.
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.0
The second step is to substitute the variable a in the first equation with what a is equal to in the second equation. Since a = 20  2b, everywhere you see a in the firtst equation, wrtite 20  2b
 one year ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.0
i have a+b=12 a+2b=20 is this correct?
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.0
No. The first equation is 2a + 4b = 24 Where you see a, write (20  2b) You should have no a's left there.
 one year ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.0
i get 4 is this correct?
 one year ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.0
as my finale answer
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.0
You ask for step by step help. I give you step by step help, but you skip a bunch of steps. You still haven't shown what you got after the substitution.
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.0
The first equation is 2a + 4b = 24 Where you see a, write (20  2b)
 one year ago

mathstudent55 Group TitleBest ResponseYou've already chosen the best response.0
Where is it then? It should look like this: 2a + 4b = 24 2(20  2b) + 4b = 24
 one year ago
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