How do you solve the following system?: $2 x + 4 y = 3, - 4 x - 9 y = - 1$ $2x +4y = 3 , -4x - 9y = -1$

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Answer 1 · 2015-11-12T16:29:24

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Change the equation to make y as a subject.

Subtitute equation 1 into equation 2 to find x.
I draw an arrow there indicates that, to eliminate the 4, u need to times it to -4x and -1.

Subtitute the answer, x=11.5 into equation 1 to find y and solve it!

Feel free to ask me if u have any question :)

How do you solve the following system?: 2x+4y=3,−4x−9y=−12x +4y = 3 , -4x - 9y = -1