6. 1/x+y - 2/x-y / 3/x-y + 4/x+y Jawaban+ cara ya,klo mau lebih jelas paket mtk kelas 7 hal 237

1/x+y - 2/x-y / 3/x-y + 4/x+y
= x+y-2x-2y / 3x-3y+4x+4y
= (-2x)-x+(-2y)+y / 3x+4x-3y+4y
= -3x+y / 7x+y

1(x-y) - 2(x+y) per (x+y)(x-y)
= -------------------------------------
3(x+y)+4(x-y) per (x+y)(x-y)
x-y-2x-2y per (x+y)(x-y)
= ---------------------------------
3x+3y+4x-4y per (x+y)(x-y)
-x-3y per(x+y)(x-y)
= --------------------------
7x-y per (x+y)(x-y)
(-x-3y)((x+y)(x-y))
= ----------------------
((x+y)(x-y) (7x-y)
-x-3y
= -------
7x-y
= -1/7x +3y