1) 9x = 27 000 => x= 3000
2x = 6000zl | 3x = 9000zl | 4x = 12000zl
2) 6 -> 14
21 -> x x=(14*21)/6 = 49 min
3) x + 1,8x = 27,6
2,8x = 27,6 => x= 276/28 = 69/7 = 9 + 6/7
1,8x = 1242/70 = 17 + 26/35
4) 1 -> x+6 = 18 3x+5 = 41
2 -> x = 12 3x = 36
3 -> x-1 = 11 x = 12
