1) 0,6 - 1,6x + 6,4 = 21 - 1,2x
7 - 1,6x = 21 - 1,2x
-1,6x + 1,2x = 21 - 7
-0,4x = 14
x = -35
2) 8(x - 2) = 5(x - 7)
8x - 16 = 5x - 35
8x - 5x = -35 + 16
3x = -19
x = -19/3