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(y-2x = -3) ×4
(4y+7x = 3) ×1
= 4y-8x = -12
= 4y+7x =3
= -15x = -15
x = 1
masukan ke salah satu persamaan
4y+7x =3
4y+7.1= 3
4y = 3 -7
4y = -4
y = -1
himpunan/hp{x,y}
hp{1,-1}
maaf kalo salah.
Y=negatif 3+2X
4y+7x=3
4(-3+2x)+7x=3
x=1
4y=negatif 1
(x,y)={1,-1}
-1-2x=negatif 3
4x(-1)+7x1=3
-3=-3
3=3
(x,y)=(1,-1)