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maddiemaze
Group Title
Use substitution to solve the system. x=2y+8
2x3y=13
 one year ago
 one year ago
maddiemaze Group Title
Use substitution to solve the system. x=2y+8 2x3y=13
 one year ago
 one year ago

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dmezzullo Group TitleBest ResponseYou've already chosen the best response.0
erm, multiply the first equation by \(2\). that yields\[\begin{cases}2x = 4y  16 \\ 2x  3y = 13\end{cases}\]add both equations and solve for \(y\).
 one year ago

johnweldon1993 Group TitleBest ResponseYou've already chosen the best response.0
you already know what x equals...so sub it in for x in the second equation 2(2y+8)  3y = 13 Now just distribute and simplify
 one year ago

johnweldon1993 Group TitleBest ResponseYou've already chosen the best response.0
dmezz thats elimination ...the problem asked for substitution :)
 one year ago

newr3d Group TitleBest ResponseYou've already chosen the best response.0
solve each system by the elimination method 1)3x+2y=10 2x+y=7 2)3x2y=7 2xy=8 3)2x+3y=13 4x+6y=10
 one year ago

harsimran_hs4 Group TitleBest ResponseYou've already chosen the best response.0
you already have the value of x from the first equation just substitute that value and get the answer
 one year ago

dmezzullo Group TitleBest ResponseYou've already chosen the best response.0
ah, yes. my bad
 one year ago
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