1.9=O.25/0.16*x
Find the value of x
Following the order of operation the way you typed it, and assuming O is the same as 0
1.9(.16) = .25x
x = 1.9(1.6)/.25 = 12.16
if you meant:
1.9=0.25/(0.16x)
1.9(.16x) = .25
3.04x = .25
x = .25/3.04 = 25/304