kasi tau dong Kaka kaka

15. 3x/2 : 6x²/4 = 3x/2 X 6x²/4 = 2/2x = 1/x 16. (2x-2)(x+5) = 2x²+10x-2x-10 = 2x²+8x-10 17. 5x-8 = 3x+12 --> 5x-3x=12+8 --> 2x=20 --> x = 10. Utk mencari x+5 lgsg substitusi x kedalam persamaan berarti x+5=10+5 = 15