-0,5(x - 4) - 7,3 = 0,8(2 – x)

-0.5x + 2 - 7.3 = 1.6 - 0.8x
-0.5x - 5.3 = 1.6 - 0.8x
-0.5x + 0.8x = 1.6 + 5.3
0.3x = 6.9
x = 6.9 / 0.3 = 23