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Destinyyyy
 one year ago
If possible, solve the system of equations. Use any method.
I will fan and metal
Destinyyyy
 one year ago
If possible, solve the system of equations. Use any method. I will fan and metal

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Destinyyyy
 one year ago
Best ResponseYou've already chosen the best response.04x+9y=10 (1) 3x+5y=4 (2)

NotTim
 one year ago
Best ResponseYou've already chosen the best response.0Use the substitution method. do you know how to do that?

Destinyyyy
 one year ago
Best ResponseYou've already chosen the best response.0Yes but the only examples I have are x with no number

Destinyyyy
 one year ago
Best ResponseYou've already chosen the best response.0I dont get how to do it with a number in front of x.

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2\[4x+9y=10\]\[3x+5y=4\] For this you could do substitution, as the other poster suggested, or you could do elimination. I'll walk you through both :)

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2Let's try substitution first. Pick one of the equations, and solve it for \(y\). Or \(x\), whatever you like :)

Destinyyyy
 one year ago
Best ResponseYou've already chosen the best response.03x+5y=4 y=3/5x+4/5

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2Okay. Now, take the other equation, and wherever you see \(y\), replace it with \(\frac{3}{5}x+\frac{4}{5}\) What do you get?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2besides some messy algebra? :)

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2Another way to do this is called elimination. With elimination, we add or subtract the equations together to get an equation with fewer variables. Sometimes we can do this right away, other times we need to multiply one or both of the equations by some factor to get the elimination to take place. \[4x+9y=10\]\[3x+5y=4\]To do elimination, we want the coefficients of the variables in one of the columns to be equal but opposite. Let's multiply the first equation by 3, and the second equation by 4. \[(3)4x + (3)9y = (3)10\]\[(4)3x+(4)5y=(4)4\] or\[12x27y=30\]\[\ \ \ 12x+20y=\ \ 16\] Agreed?

Destinyyyy
 one year ago
Best ResponseYou've already chosen the best response.0K. I know how to do graphing, elimination and substitution. I just didn't have any examples with it in the version thats all.. Thanks for your help.

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2Ok. Yeah, you just solve for the substitution variable, doesn't matter if the coefficient is something other than the nice, easy 1 :)

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2Always happy to hear someone say "yeah, I know how to do that already!" — usually it is "I don't know how to do that" :)
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