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raebaby420
 one year ago
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)
raebaby420
 one year ago
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)

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Hero
 one year ago
Best ResponseYou've already chosen the best response.1Add 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.

raebaby420
 one year ago
Best ResponseYou've already chosen the best response.0I don't know how to get the Y... that's why im asking for help..

raebaby420
 one year ago
Best ResponseYou've already chosen the best response.0Do I do it the same way you got x?

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

Hero
 one year ago
Best ResponseYou've already chosen the best response.1y = 4(1)  3 y = 4  3 y = 1 Therefore, the point is (1,1)

Hero
 one year ago
Best ResponseYou've already chosen the best response.1Reread it all over again, but slowly.
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