bantuin ya (6×1,5)+(9×-2/3)=

= (6 x 1,5) + (9x -2/3)
= 9 + -18 dibagi 3
= 9 + -6
= 9 - 6
= 3

maaf ya kalau salah itu setauku sih hehehehehehe

6x1,5=9
9x-2/3=-6

jadi
(6 x 1,5)+(9 x -2/3)=9+(-6)
=3