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raebaby420
Group Title
Sorry for being a pain :D
Use the substitution method to solve the following system of equations.
4x − y = 3
7x − 9y = −2
(1, 1)
(6, −3)
(6, 1)
(1, −3)
 11 months ago
 11 months ago
raebaby420 Group Title
Sorry for being a pain :D Use the substitution method to solve the following system of equations. 4x − y = 3 7x − 9y = −2 (1, 1) (6, −3) (6, 1) (1, −3)
 11 months ago
 11 months ago

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Hero Group TitleBest ResponseYou've already chosen the best response.1
Add y to both sides, then subtract 3 from both sides to isolate y in the first equation. Doing so gives: y = 4x  3 The expression for y can be substituted into the second equation: 7x  9y = 2 and after substitution we have 7x  9(4x  3) = 2 Now we simplify and solve for x: 7x  36x + 27 = 2 (7  36)x + 27 = 2 (36  7)x + 27 + 2 = 0 (29)x + 29 = 0 29 = 29x 29/29 = x 1 = x Now plug the value for x back into the one of the original equations to get y.
 11 months ago

raebaby420 Group TitleBest ResponseYou've already chosen the best response.0
I don't know how to get the Y... that's why im asking for help..
 11 months ago

raebaby420 Group TitleBest ResponseYou've already chosen the best response.0
Do I do it the same way you got x?
 11 months ago

Hero Group TitleBest ResponseYou've already chosen the best response.1
We isolated y earlier to get y = 4x  3 If we substitute x = 1 into that equation, we get y.
 11 months ago

raebaby420 Group TitleBest ResponseYou've already chosen the best response.0
Oh.. so its D
 11 months ago

raebaby420 Group TitleBest ResponseYou've already chosen the best response.0
(1, 3)
 11 months ago

Hero Group TitleBest ResponseYou've already chosen the best response.1
y = 4(1)  3 y = 4  3 y = 1 Therefore, the point is (1,1)
 11 months ago

raebaby420 Group TitleBest ResponseYou've already chosen the best response.0
Im confused
 11 months ago

Hero Group TitleBest ResponseYou've already chosen the best response.1
Reread it all over again, but slowly.
 11 months ago
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