1)-0,5(-2x + 4) - (10 - x)= x - 2 - 10 + x = 2x - 12
2) -6 * (2/3a - 1/6) + 4 * (3/4a - 11/12)= -4a + 1 + 3a - 11/3 = -a - 2 2/3
3)5(2/5x - 0,7) - 3(1/3x - 0,2) = 2x - 3,5 - x + 0,6 = x - 2,9
4)3(2x + 8) - (5x + 2) = 6x + 24 - 5x - 2 = x + 22
5)-3(3y + 4) + 4(2y - 1)= -9y - 12 + 8y - 4 = -y - 16
6)8(3 - 2x) + 5(3x + 5) = 24 - 16x + 15x + 25 = -x + 49
7)1/3(3x - 6) - 2/7(7x - 21)= x -2 - 2x + 6 = -x + 4
8)1/6(6x - 1,2) - 3/5(5x - 1,5) = x - 0,2 - 3x + 0,9 = -2x + 0,7