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