Bantu ngerjakan PR gurunya gak nerangin asal tugas aja

7. 2*3 x*-9 y*6 z*-3 = 8 y*6 / x*9 z*3 (c)
8.-16 k*3 m*2 n*7 (b)
9. 3*3 a*-6 b*3 /c*12= 27 b*3/ a*6 c*12 (c)
10. utk a= -6-15+6 = -15
utk b= 3-10-2 = -9
jadi jawabannya a*-15 b*-9 (a)