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equation 1 : x-3y=1 ; x=1+3y
equation 2 : 2x+3y=-4

1 -> 2 : 2(1+3y)+3y=-4

x=1+3(-2/3) = 1-2 = -1


multiply the first equation by 2 which results to 2x-6y=2 then subtract it to equation 2 to get 0x-9y=6 solve for y; y=-2/3 then substitute y to equation 1 to get x=-1
0 0 0
Thank you po! =D
idk how to make matrix for you here sorry
No It's okay :) :D
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