A) 1/3x + 1/3 - 2/3 - 2/3x +2 = 0
-x = -3
x = 3
б) 1,5x + 3,5 - 1,5x +1,5 = 3/4x + 3/4
-3/4x + 4. 1/4 (4 целых, одна четвертая) = 0
x = 4.1/4 : 3/4
x = 5. 2/3
в) x2 - 3x + 2x2 - x = 3x2 - 6x - 3
2x + 3 = 0
2x = -3
x = -1.5
г) 3 + 6x2 - 8x = 8x2 + 20x - 2x2 +2x
3+ 6x2 - 8x - 8x2 - 20x + 2x2 - 2x = 0
-30x = -3
x= 0.1