If I’m not mistaken, to solve for x you have to get it by itself so you need to divide 0.5 from both sides:
0.8/ 0.5 = 0.5x/ 0.5
Cross out the 0.5’s on the right because they cancel out and you will end up with:
0.8/ 0.5 = x
All you have to do then is divide 0.8 by 0.5 and you get:
1.6 = x