harga matlak 2x - 1 harga mutlak = 3x + 1

2k-1=3k+1. 2k-1=-3k-1
-k=2 ,,k=-2. 5k=0,,,k=0

7k+2=2k-3. 7k+2=-2k+3
5k=-5. 9k=1
k= -1. k=¹/9